Radiometric dating or radioactive dating is a technique used to date materials such as rocks or carbon, in which trace radioactive impurities were selectively incorporated when they formed. The method compares the abundance of a naturally occurring radioactive isotope within the material and the abundance of its decay products, which form at a known constant rate of decay. The use of radiometric dating was first published in 1907 by Bertram Boltwood and is now the principal source of information about the absolute age of rocks and other geological features, including the age of the Earth itself, and can be used to date a wide range of natural and man-made materials.
When you read about the ages of certain ancient artifacts, or even the age of the earth itself, how do we know such numbers? How can we know that a fossil is precisely 250 million years old? The key technique here is radiometric dating. This is where we use our understanding of radioactive decay to measure the age of an object. How does this work, you ask? Watch and find out!
Watch the whole General Chemistry playlist: http://bit.ly/ProfDaveGenChem
Study for the AP Chemistry exam with me: https://bit.ly/ProfDaveAPChem
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published: 09 Aug 2019
Radiometric dating / Carbon dating
How are the ages of fossils and rocks determined? This video explains the basics behind radiometric dating.
Teachers: You can purchase this PowerPoint from my online store. The link below will provide the details:
https://www.teacherspayteachers.com/Product/Radiometric-Dating-Carbon-Dating-PowerPoint-4631353
published: 15 Jun 2019
How Does Radiometric Dating Work? | Ars Technica
How does a geologist know how old a rock formation is? The answer is a technique called radiometric dating.
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How Does Radiometric Dating Work? | Ars Technica
published: 30 Oct 2018
How Does Radiocarbon Dating Work? - Instant Egghead #28
How do scientists determine the age of fossils that have been under the surface of the earth for thousands of years? Scientific American Editor Michael Moyer explains the process of radiocarbon dating.
Please visit our website to discover the latest advances in science and technology: http://bit.ly/30Z4ZpZ
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published: 04 Dec 2012
Radiometric Dating
A brief review of radiometric dating as it applies to Earth Formation. Developed for an introductory-level Earth Science Course. To access versions with CC and scripts, go to: http://www.ccsf.edu/earthrocks
Part of a 5-part Earth Formation video series:
Part 1: Earth Formation
Part 2: Radiometric Dating
Part 3: Density
Part 4: Early Earth
Part 5: Life on Earth
published: 16 Jan 2015
Radiometric Dating
A video from the New Zealand E=Mc2 website regarding radiometric dating.
Full article and more videos- http://www.eequalsmcsquared.auckland.ac.nz/sites/emc2/videos/cool-kiwi-science.cfm
published: 31 Jan 2008
Radioactive Dating
Have you ever wondered how paleontologists and geologists determine the age of fossils or geologic events which occurred in the past? Explore the processes of radioactive decay and radioactive dating.
published: 24 Jul 2015
Radioactivity - Radioactive Dating - Using Half Life to find the age of objects.
I go through how we can use count rate in science, coupled with Half Life to help us work out how old something is. A common question in GCSE and High School Physics exams. For AQA, OCR and Edexcel exam boards.
Video illustration and animations by www.instagram.com/e.killistrations
When you read about the ages of certain ancient artifacts, or even the age of the earth itself, how do we know such numbers? How can we know that a fossil is pr...
When you read about the ages of certain ancient artifacts, or even the age of the earth itself, how do we know such numbers? How can we know that a fossil is precisely 250 million years old? The key technique here is radiometric dating. This is where we use our understanding of radioactive decay to measure the age of an object. How does this work, you ask? Watch and find out!
Watch the whole General Chemistry playlist: http://bit.ly/ProfDaveGenChem
Study for the AP Chemistry exam with me: https://bit.ly/ProfDaveAPChem
Organic Chemistry Tutorials: http://bit.ly/ProfDaveOrgChem
Biochemistry Tutorials: http://bit.ly/ProfDaveBiochem
Biology Tutorials: http://bit.ly/ProfDaveBio
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Check out "Is This Wi-Fi Organic?", my book on disarming pseudoscience!
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Bookshop: https://bit.ly/39cKADM
Barnes and Noble: https://bit.ly/3pUjmrn
Book Depository: http://bit.ly/3aOVDlT
When you read about the ages of certain ancient artifacts, or even the age of the earth itself, how do we know such numbers? How can we know that a fossil is precisely 250 million years old? The key technique here is radiometric dating. This is where we use our understanding of radioactive decay to measure the age of an object. How does this work, you ask? Watch and find out!
Watch the whole General Chemistry playlist: http://bit.ly/ProfDaveGenChem
Study for the AP Chemistry exam with me: https://bit.ly/ProfDaveAPChem
Organic Chemistry Tutorials: http://bit.ly/ProfDaveOrgChem
Biochemistry Tutorials: http://bit.ly/ProfDaveBiochem
Biology Tutorials: http://bit.ly/ProfDaveBio
Classical Physics Tutorials: http://bit.ly/ProfDavePhysics1
Modern Physics Tutorials: http://bit.ly/ProfDavePhysics2
Mathematics Tutorials: http://bit.ly/ProfDaveMaths
EMAIL► [email protected]
PATREON► http://patreon.com/ProfessorDaveExplains
Check out "Is This Wi-Fi Organic?", my book on disarming pseudoscience!
Amazon: https://amzn.to/2HtNpVH
Bookshop: https://bit.ly/39cKADM
Barnes and Noble: https://bit.ly/3pUjmrn
Book Depository: http://bit.ly/3aOVDlT
How are the ages of fossils and rocks determined? This video explains the basics behind radiometric dating.
Teachers: You can purchase this PowerPoint from my ...
How are the ages of fossils and rocks determined? This video explains the basics behind radiometric dating.
Teachers: You can purchase this PowerPoint from my online store. The link below will provide the details:
https://www.teacherspayteachers.com/Product/Radiometric-Dating-Carbon-Dating-PowerPoint-4631353
How are the ages of fossils and rocks determined? This video explains the basics behind radiometric dating.
Teachers: You can purchase this PowerPoint from my online store. The link below will provide the details:
https://www.teacherspayteachers.com/Product/Radiometric-Dating-Carbon-Dating-PowerPoint-4631353
How does a geologist know how old a rock formation is? The answer is a technique called radiometric dating.
Connect with Ars Technica:
Visit ArsTechnica.com:...
How does a geologist know how old a rock formation is? The answer is a technique called radiometric dating.
Connect with Ars Technica:
Visit ArsTechnica.com: http://arstechnica.com
Follow Ars Technica on Facebook: https://www.facebook.com/arstechnica
Follow Ars Technica on Google+: https://plus.google.com/+ArsTechnica/videos
Follow Ars Technica on Twitter: https://twitter.com/arstechnica
How Does Radiometric Dating Work? | Ars Technica
How does a geologist know how old a rock formation is? The answer is a technique called radiometric dating.
Connect with Ars Technica:
Visit ArsTechnica.com: http://arstechnica.com
Follow Ars Technica on Facebook: https://www.facebook.com/arstechnica
Follow Ars Technica on Google+: https://plus.google.com/+ArsTechnica/videos
Follow Ars Technica on Twitter: https://twitter.com/arstechnica
How Does Radiometric Dating Work? | Ars Technica
How do scientists determine the age of fossils that have been under the surface of the earth for thousands of years? Scientific American Editor Michael Moyer ex...
How do scientists determine the age of fossils that have been under the surface of the earth for thousands of years? Scientific American Editor Michael Moyer explains the process of radiocarbon dating.
Please visit our website to discover the latest advances in science and technology: http://bit.ly/30Z4ZpZ
Discover world-changing science with a subscription to Scientific American. Learn more: http://bit.ly/2RtR1cs
How do scientists determine the age of fossils that have been under the surface of the earth for thousands of years? Scientific American Editor Michael Moyer explains the process of radiocarbon dating.
Please visit our website to discover the latest advances in science and technology: http://bit.ly/30Z4ZpZ
Discover world-changing science with a subscription to Scientific American. Learn more: http://bit.ly/2RtR1cs
A brief review of radiometric dating as it applies to Earth Formation. Developed for an introductory-level Earth Science Course. To access versions with CC and ...
A brief review of radiometric dating as it applies to Earth Formation. Developed for an introductory-level Earth Science Course. To access versions with CC and scripts, go to: http://www.ccsf.edu/earthrocks
Part of a 5-part Earth Formation video series:
Part 1: Earth Formation
Part 2: Radiometric Dating
Part 3: Density
Part 4: Early Earth
Part 5: Life on Earth
A brief review of radiometric dating as it applies to Earth Formation. Developed for an introductory-level Earth Science Course. To access versions with CC and scripts, go to: http://www.ccsf.edu/earthrocks
Part of a 5-part Earth Formation video series:
Part 1: Earth Formation
Part 2: Radiometric Dating
Part 3: Density
Part 4: Early Earth
Part 5: Life on Earth
A video from the New Zealand E=Mc2 website regarding radiometric dating.
Full article and more videos- http://www.eequalsmcsquared.auckland.ac.nz/sites/emc2/vi...
A video from the New Zealand E=Mc2 website regarding radiometric dating.
Full article and more videos- http://www.eequalsmcsquared.auckland.ac.nz/sites/emc2/videos/cool-kiwi-science.cfm
A video from the New Zealand E=Mc2 website regarding radiometric dating.
Full article and more videos- http://www.eequalsmcsquared.auckland.ac.nz/sites/emc2/videos/cool-kiwi-science.cfm
Have you ever wondered how paleontologists and geologists determine the age of fossils or geologic events which occurred in the past? Explore the processes of ...
Have you ever wondered how paleontologists and geologists determine the age of fossils or geologic events which occurred in the past? Explore the processes of radioactive decay and radioactive dating.
Have you ever wondered how paleontologists and geologists determine the age of fossils or geologic events which occurred in the past? Explore the processes of radioactive decay and radioactive dating.
I go through how we can use count rate in science, coupled with Half Life to help us work out how old something is. A common question in GCSE and High School Ph...
I go through how we can use count rate in science, coupled with Half Life to help us work out how old something is. A common question in GCSE and High School Physics exams. For AQA, OCR and Edexcel exam boards.
Video illustration and animations by www.instagram.com/e.killistrations
I go through how we can use count rate in science, coupled with Half Life to help us work out how old something is. A common question in GCSE and High School Physics exams. For AQA, OCR and Edexcel exam boards.
Video illustration and animations by www.instagram.com/e.killistrations
☢ This video was sponsored by Radiacode 102 - the world's first pocket-size radiation detector and spectrometer for all natural science enthusiasts
Order now - https://102.radiacode.com/3 and try out a new scientific hobby!
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Do not repeat the experiments shown in this video!
Animation of atomic bombs: https://www.youtube.com/channel/UCocSPp2haPIl0_edFrDimPw
Hi everyone! I guess you have figured that this video is going to be about such a metal as uranium. However, let me make give a small warning in order to calm you down. I think now we have settled everything and can move on to considering properties of the most dangerous metal on eart...
published: 16 Jun 2018
Radiometric Dating: Carbon-14 and Uranium-238
When you read about the ages of certain ancient artifacts, or even the age of the earth itself, how do we know such numbers? How can we know that a fossil is precisely 250 million years old? The key technique here is radiometric dating. This is where we use our understanding of radioactive decay to measure the age of an object. How does this work, you ask? Watch and find out!
Watch the whole General Chemistry playlist: http://bit.ly/ProfDaveGenChem
Study for the AP Chemistry exam with me: https://bit.ly/ProfDaveAPChem
Organic Chemistry Tutorials: http://bit.ly/ProfDaveOrgChem
Biochemistry Tutorials: http://bit.ly/ProfDaveBiochem
Biology Tutorials: http://bit.ly/ProfDaveBio
Classical Physics Tutorials: http://bit.ly/ProfDavePhysics1
Modern Physics Tutorials: http://bit.ly/ProfDavePhysics...
published: 09 Aug 2019
क्या होगा अगर आपने यूरेनियम खा लिया तो ? // What will Happen If You Eat Uranium ? Science . .
क्या होगा अगर आपने यूरेनियम खा लिया तो ? // What will Happen If You Eat Uranium ? Science . .
Uranium is a chemical element with symbol U and atomic number 92. It is a silvery-grey metal in the actinide series of the periodic table. A uranium atom has 92 protons and 92 electrons, of which 6 are valence electrons. Uranium is weakly radioactive because all isotopes of uranium are unstable, with half-lives varying between 159,200 years and 4.5 billion years. The most common isotopes in natural uranium are uranium-238 (which has 146 neutrons and accounts for over 99%) and uranium-235 (which has 143 neutrons). Uranium has the highest atomic weight of the primordially occurring elements. Its density is about 70% higher than that of lead, and slightly lower than that of gold or tungsten. It occu...
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Uranium-238
Uranium-238 (238U or U-238) is the most common isotope of uranium found in nature.It is not fissile, but is a fertile material: it can capture a slow neutron and after two beta decays become fissile plutonium-239.
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published: 22 Jan 2016
the uranium decay chain - it's not just an alpha emitter!
this video is about uranium ore, pitchblende - and the natural (radio-)isotope mix that comes with it.
uranium is indeed an alpha emitter - but don't be fooled, this is not the only radiation emitted by uranium ore! there are alpha and beta particles, gamma rays, and even neutrons...
published: 03 Nov 2009
URANIUM 238: THE PENTAGON'S DIRTY POOL
Uranium 238 depicts the hazards that the use of depleted uranium or DU in conventional weapons poses for the health of soldiers and civilians. Through interviews with soldiers, scientists and activists, the documentary explores the health hazards when this radioactive and toxic material is ingested or inhaled by people in the battle fields and shooting ranges. Based in scientific data this video has been used by the International Coalition to Ban Uranium Weapons (ICBUW) as part of its international campaign to prohibit DU as a military component.
☢ This video was sponsored by Radiacode 102 - the world's first pocket-size radiation detector and spectrometer for all natural science enthusiasts
Order now -...
☢ This video was sponsored by Radiacode 102 - the world's first pocket-size radiation detector and spectrometer for all natural science enthusiasts
Order now - https://102.radiacode.com/3 and try out a new scientific hobby!
e-mail: [email protected]
Patreon: https://www.patreon.com/Thoisoi?ty=h
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Do not repeat the experiments shown in this video!
Animation of atomic bombs: https://www.youtube.com/channel/UCocSPp2haPIl0_edFrDimPw
Hi everyone! I guess you have figured that this video is going to be about such a metal as uranium. However, let me make give a small warning in order to calm you down. I think now we have settled everything and can move on to considering properties of the most dangerous metal on earth - uranium. Uranium belongs to the actinides series in the periodic table that is to radioactive elements and its atomic number is 92. Uranium is 40 times more abundant in earth’s crust than silver. It forms in abundance upon rapid neutron capture inside spinning supernovas. That is why uranium was discovered quite early, in Germany in 18-th century. Its discoverer, Martin Heinrich Klaproth, named it after a newly discovered planet of the solar system, after Uranus. In nature uranium is often found in such minerals as uraninite and autunite. This metal often has several oxidation states in those minerals. Thanks to the beautiful yellow colour of such minerals, glass blowers added them to glass. As a result minerals would give such glass a beautiful greenish colour. It’s a pity that back then craftsmen didn’t not about the toxicity of uranium compounds. Nevertheless, pure metallic uranium can be obtained from uranium ore via reduction by calcium which looks very ordinary. Since mostly uranium naturally occurs in the form of uranium-238 isotope with a half-life of about 4.468 billion years, in 99, 23% of cases to be precise. Depleted uranium is most frequently used for chemical researches, that is uranium-238, in order to reduce scientists’ exposure to its radiation. Also there are only two radioactive metals that occur naturally. Those are uranium and thorium. It’s so because of their extremely long half-lives. Pure uranium obtained from its ore looks quite dark as its surface oxidizes pretty fast because of the high chemical activeness of this metal. That is why it is often stored in argon and also all experiments with uranium are conducted in argon medium. Usually a piece of pure metallic uranium-238 is ripped to such small shreds on a lathe in a laboratory. It is noteworthy that these shreds in the test tube already emit beta and gamma radiation.
☢ This video was sponsored by Radiacode 102 - the world's first pocket-size radiation detector and spectrometer for all natural science enthusiasts
Order now - https://102.radiacode.com/3 and try out a new scientific hobby!
e-mail: [email protected]
Patreon: https://www.patreon.com/Thoisoi?ty=h
Facebook: https://www.facebook.com/thoisoi2
Instagram: https://www.instagram.com/thoisoi/
Do not repeat the experiments shown in this video!
Animation of atomic bombs: https://www.youtube.com/channel/UCocSPp2haPIl0_edFrDimPw
Hi everyone! I guess you have figured that this video is going to be about such a metal as uranium. However, let me make give a small warning in order to calm you down. I think now we have settled everything and can move on to considering properties of the most dangerous metal on earth - uranium. Uranium belongs to the actinides series in the periodic table that is to radioactive elements and its atomic number is 92. Uranium is 40 times more abundant in earth’s crust than silver. It forms in abundance upon rapid neutron capture inside spinning supernovas. That is why uranium was discovered quite early, in Germany in 18-th century. Its discoverer, Martin Heinrich Klaproth, named it after a newly discovered planet of the solar system, after Uranus. In nature uranium is often found in such minerals as uraninite and autunite. This metal often has several oxidation states in those minerals. Thanks to the beautiful yellow colour of such minerals, glass blowers added them to glass. As a result minerals would give such glass a beautiful greenish colour. It’s a pity that back then craftsmen didn’t not about the toxicity of uranium compounds. Nevertheless, pure metallic uranium can be obtained from uranium ore via reduction by calcium which looks very ordinary. Since mostly uranium naturally occurs in the form of uranium-238 isotope with a half-life of about 4.468 billion years, in 99, 23% of cases to be precise. Depleted uranium is most frequently used for chemical researches, that is uranium-238, in order to reduce scientists’ exposure to its radiation. Also there are only two radioactive metals that occur naturally. Those are uranium and thorium. It’s so because of their extremely long half-lives. Pure uranium obtained from its ore looks quite dark as its surface oxidizes pretty fast because of the high chemical activeness of this metal. That is why it is often stored in argon and also all experiments with uranium are conducted in argon medium. Usually a piece of pure metallic uranium-238 is ripped to such small shreds on a lathe in a laboratory. It is noteworthy that these shreds in the test tube already emit beta and gamma radiation.
When you read about the ages of certain ancient artifacts, or even the age of the earth itself, how do we know such numbers? How can we know that a fossil is pr...
When you read about the ages of certain ancient artifacts, or even the age of the earth itself, how do we know such numbers? How can we know that a fossil is precisely 250 million years old? The key technique here is radiometric dating. This is where we use our understanding of radioactive decay to measure the age of an object. How does this work, you ask? Watch and find out!
Watch the whole General Chemistry playlist: http://bit.ly/ProfDaveGenChem
Study for the AP Chemistry exam with me: https://bit.ly/ProfDaveAPChem
Organic Chemistry Tutorials: http://bit.ly/ProfDaveOrgChem
Biochemistry Tutorials: http://bit.ly/ProfDaveBiochem
Biology Tutorials: http://bit.ly/ProfDaveBio
Classical Physics Tutorials: http://bit.ly/ProfDavePhysics1
Modern Physics Tutorials: http://bit.ly/ProfDavePhysics2
Mathematics Tutorials: http://bit.ly/ProfDaveMaths
EMAIL► [email protected]
PATREON► http://patreon.com/ProfessorDaveExplains
Check out "Is This Wi-Fi Organic?", my book on disarming pseudoscience!
Amazon: https://amzn.to/2HtNpVH
Bookshop: https://bit.ly/39cKADM
Barnes and Noble: https://bit.ly/3pUjmrn
Book Depository: http://bit.ly/3aOVDlT
When you read about the ages of certain ancient artifacts, or even the age of the earth itself, how do we know such numbers? How can we know that a fossil is precisely 250 million years old? The key technique here is radiometric dating. This is where we use our understanding of radioactive decay to measure the age of an object. How does this work, you ask? Watch and find out!
Watch the whole General Chemistry playlist: http://bit.ly/ProfDaveGenChem
Study for the AP Chemistry exam with me: https://bit.ly/ProfDaveAPChem
Organic Chemistry Tutorials: http://bit.ly/ProfDaveOrgChem
Biochemistry Tutorials: http://bit.ly/ProfDaveBiochem
Biology Tutorials: http://bit.ly/ProfDaveBio
Classical Physics Tutorials: http://bit.ly/ProfDavePhysics1
Modern Physics Tutorials: http://bit.ly/ProfDavePhysics2
Mathematics Tutorials: http://bit.ly/ProfDaveMaths
EMAIL► [email protected]
PATREON► http://patreon.com/ProfessorDaveExplains
Check out "Is This Wi-Fi Organic?", my book on disarming pseudoscience!
Amazon: https://amzn.to/2HtNpVH
Bookshop: https://bit.ly/39cKADM
Barnes and Noble: https://bit.ly/3pUjmrn
Book Depository: http://bit.ly/3aOVDlT
क्या होगा अगर आपने यूरेनियम खा लिया तो ? // What will Happen If You Eat Uranium ? Science . .
Uranium is a chemical element with symbol U and atomic number 92....
क्या होगा अगर आपने यूरेनियम खा लिया तो ? // What will Happen If You Eat Uranium ? Science . .
Uranium is a chemical element with symbol U and atomic number 92. It is a silvery-grey metal in the actinide series of the periodic table. A uranium atom has 92 protons and 92 electrons, of which 6 are valence electrons. Uranium is weakly radioactive because all isotopes of uranium are unstable, with half-lives varying between 159,200 years and 4.5 billion years. The most common isotopes in natural uranium are uranium-238 (which has 146 neutrons and accounts for over 99%) and uranium-235 (which has 143 neutrons). Uranium has the highest atomic weight of the primordially occurring elements. Its density is about 70% higher than that of lead, and slightly lower than that of gold or tungsten. It occurs naturally in low concentrations of a few parts per million in soil, rock and water, and is commercially extracted from uranium-bearing minerals such as uraninite.
In nature, uranium is found as uranium-238 (99.2739–99.2752%), uranium-235 (0.7198–0.7202%), and a very small amount of uranium-234 (0.0050–0.0059%). Uranium decays slowly by emitting an alpha particle. The half-life of uranium-238 is about 4.47 billion years and that of uranium-235 is 704 million years, making them useful in dating the age of the Earth.
Many contemporary uses of uranium exploit its unique nuclear properties. Uranium-235 is the only naturally occurring fissile isotope, which makes it widely used in nuclear power plants and nuclear weapons. However, because of the tiny amounts found in nature, uranium needs to undergo enrichment so that enough uranium-235 is present. Uranium-238 is fissionable by fast neutrons, and is fertile, meaning it can be transmuted to fissile plutonium-239 in a nuclear reactor. Another fissile isotope, uranium-233, can be produced from natural thorium and is also important in nuclear technology. Uranium-238 has a small probability for spontaneous fission or even induced fission with fast neutrons; uranium-235 and to a lesser degree uranium-233 have a much higher fission cross-section for slow neutrons. In sufficient concentration, these isotopes maintain a sustained nuclear chain reaction. This generates the heat in nuclear power reactors, and produces the fissile material for nuclear weapons. Depleted uranium (238U) is used in kinetic energy penetrators and armor plating. Uranium is used as a colorant in uranium glass, producing lemon yellow to green colors. Uranium glass fluoresces green in ultraviolet light. It was also used for tinting and shading in early photography.
What Happens If You Eat Uranium, amazing chemical reactions, chemistry
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क्या होगा अगर आपने यूरेनियम खा लिया तो ? // What will Happen If You Eat Uranium ? Science . .
Uranium is a chemical element with symbol U and atomic number 92. It is a silvery-grey metal in the actinide series of the periodic table. A uranium atom has 92 protons and 92 electrons, of which 6 are valence electrons. Uranium is weakly radioactive because all isotopes of uranium are unstable, with half-lives varying between 159,200 years and 4.5 billion years. The most common isotopes in natural uranium are uranium-238 (which has 146 neutrons and accounts for over 99%) and uranium-235 (which has 143 neutrons). Uranium has the highest atomic weight of the primordially occurring elements. Its density is about 70% higher than that of lead, and slightly lower than that of gold or tungsten. It occurs naturally in low concentrations of a few parts per million in soil, rock and water, and is commercially extracted from uranium-bearing minerals such as uraninite.
In nature, uranium is found as uranium-238 (99.2739–99.2752%), uranium-235 (0.7198–0.7202%), and a very small amount of uranium-234 (0.0050–0.0059%). Uranium decays slowly by emitting an alpha particle. The half-life of uranium-238 is about 4.47 billion years and that of uranium-235 is 704 million years, making them useful in dating the age of the Earth.
Many contemporary uses of uranium exploit its unique nuclear properties. Uranium-235 is the only naturally occurring fissile isotope, which makes it widely used in nuclear power plants and nuclear weapons. However, because of the tiny amounts found in nature, uranium needs to undergo enrichment so that enough uranium-235 is present. Uranium-238 is fissionable by fast neutrons, and is fertile, meaning it can be transmuted to fissile plutonium-239 in a nuclear reactor. Another fissile isotope, uranium-233, can be produced from natural thorium and is also important in nuclear technology. Uranium-238 has a small probability for spontaneous fission or even induced fission with fast neutrons; uranium-235 and to a lesser degree uranium-233 have a much higher fission cross-section for slow neutrons. In sufficient concentration, these isotopes maintain a sustained nuclear chain reaction. This generates the heat in nuclear power reactors, and produces the fissile material for nuclear weapons. Depleted uranium (238U) is used in kinetic energy penetrators and armor plating. Uranium is used as a colorant in uranium glass, producing lemon yellow to green colors. Uranium glass fluoresces green in ultraviolet light. It was also used for tinting and shading in early photography.
What Happens If You Eat Uranium, amazing chemical reactions, chemistry
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Uranium-238
Uranium-238 (238U o...
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Uranium-238
Uranium-238 (238U or U-238) is the most common isotope of uranium found in nature.It is not fissile, but is a fertile material: it can capture a slow neutron and after two beta decays become fissile plutonium-239.
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Uranium-238
Uranium-238 (238U or U-238) is the most common isotope of uranium found in nature.It is not fissile, but is a fertile material: it can capture a slow neutron and after two beta decays become fissile plutonium-239.
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this video is about uranium ore, pitchblende - and the natural (radio-)isotope mix that comes with it.
uranium is indeed an alpha emitter - but don't be fooled...
this video is about uranium ore, pitchblende - and the natural (radio-)isotope mix that comes with it.
uranium is indeed an alpha emitter - but don't be fooled, this is not the only radiation emitted by uranium ore! there are alpha and beta particles, gamma rays, and even neutrons...
this video is about uranium ore, pitchblende - and the natural (radio-)isotope mix that comes with it.
uranium is indeed an alpha emitter - but don't be fooled, this is not the only radiation emitted by uranium ore! there are alpha and beta particles, gamma rays, and even neutrons...
Uranium 238 depicts the hazards that the use of depleted uranium or DU in conventional weapons poses for the health of soldiers and civilians. Through interview...
Uranium 238 depicts the hazards that the use of depleted uranium or DU in conventional weapons poses for the health of soldiers and civilians. Through interviews with soldiers, scientists and activists, the documentary explores the health hazards when this radioactive and toxic material is ingested or inhaled by people in the battle fields and shooting ranges. Based in scientific data this video has been used by the International Coalition to Ban Uranium Weapons (ICBUW) as part of its international campaign to prohibit DU as a military component.
Uranium 238 depicts the hazards that the use of depleted uranium or DU in conventional weapons poses for the health of soldiers and civilians. Through interviews with soldiers, scientists and activists, the documentary explores the health hazards when this radioactive and toxic material is ingested or inhaled by people in the battle fields and shooting ranges. Based in scientific data this video has been used by the International Coalition to Ban Uranium Weapons (ICBUW) as part of its international campaign to prohibit DU as a military component.
When you read about the ages of certain ancient artifacts, or even the age of the earth itself, how do we know such numbers? How can we know that a fossil is precisely 250 million years old? The key technique here is radiometric dating. This is where we use our understanding of radioactive decay to measure the age of an object. How does this work, you ask? Watch and find out!
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How are the ages of fossils and rocks determined? This video explains the basics behind radiometric dating.
Teachers: You can purchase this PowerPoint from my online store. The link below will provide the details:
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How does a geologist know how old a rock formation is? The answer is a technique called radiometric dating.
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How Does Radiometric Dating Work? | Ars Technica
How do scientists determine the age of fossils that have been under the surface of the earth for thousands of years? Scientific American Editor Michael Moyer explains the process of radiocarbon dating.
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A brief review of radiometric dating as it applies to Earth Formation. Developed for an introductory-level Earth Science Course. To access versions with CC and scripts, go to: http://www.ccsf.edu/earthrocks
Part of a 5-part Earth Formation video series:
Part 1: Earth Formation
Part 2: Radiometric Dating
Part 3: Density
Part 4: Early Earth
Part 5: Life on Earth
A video from the New Zealand E=Mc2 website regarding radiometric dating.
Full article and more videos- http://www.eequalsmcsquared.auckland.ac.nz/sites/emc2/videos/cool-kiwi-science.cfm
Have you ever wondered how paleontologists and geologists determine the age of fossils or geologic events which occurred in the past? Explore the processes of radioactive decay and radioactive dating.
I go through how we can use count rate in science, coupled with Half Life to help us work out how old something is. A common question in GCSE and High School Physics exams. For AQA, OCR and Edexcel exam boards.
Video illustration and animations by www.instagram.com/e.killistrations
Radiometric dating or radioactive dating is a technique used to date materials such as rocks or carbon, in which trace radioactive impurities were selectively incorporated when they formed. The method compares the abundance of a naturally occurring radioactive isotope within the material and the abundance of its decay products, which form at a known constant rate of decay. The use of radiometric dating was first published in 1907 by Bertram Boltwood and is now the principal source of information about the absolute age of rocks and other geological features, including the age of the Earth itself, and can be used to date a wide range of natural and man-made materials.
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Hi everyone! I guess you have figured that this video is going to be about such a metal as uranium. However, let me make give a small warning in order to calm you down. I think now we have settled everything and can move on to considering properties of the most dangerous metal on earth - uranium. Uranium belongs to the actinides series in the periodic table that is to radioactive elements and its atomic number is 92. Uranium is 40 times more abundant in earth’s crust than silver. It forms in abundance upon rapid neutron capture inside spinning supernovas. That is why uranium was discovered quite early, in Germany in 18-th century. Its discoverer, Martin Heinrich Klaproth, named it after a newly discovered planet of the solar system, after Uranus. In nature uranium is often found in such minerals as uraninite and autunite. This metal often has several oxidation states in those minerals. Thanks to the beautiful yellow colour of such minerals, glass blowers added them to glass. As a result minerals would give such glass a beautiful greenish colour. It’s a pity that back then craftsmen didn’t not about the toxicity of uranium compounds. Nevertheless, pure metallic uranium can be obtained from uranium ore via reduction by calcium which looks very ordinary. Since mostly uranium naturally occurs in the form of uranium-238 isotope with a half-life of about 4.468 billion years, in 99, 23% of cases to be precise. Depleted uranium is most frequently used for chemical researches, that is uranium-238, in order to reduce scientists’ exposure to its radiation. Also there are only two radioactive metals that occur naturally. Those are uranium and thorium. It’s so because of their extremely long half-lives. Pure uranium obtained from its ore looks quite dark as its surface oxidizes pretty fast because of the high chemical activeness of this metal. That is why it is often stored in argon and also all experiments with uranium are conducted in argon medium. Usually a piece of pure metallic uranium-238 is ripped to such small shreds on a lathe in a laboratory. It is noteworthy that these shreds in the test tube already emit beta and gamma radiation.
When you read about the ages of certain ancient artifacts, or even the age of the earth itself, how do we know such numbers? How can we know that a fossil is precisely 250 million years old? The key technique here is radiometric dating. This is where we use our understanding of radioactive decay to measure the age of an object. How does this work, you ask? Watch and find out!
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Study for the AP Chemistry exam with me: https://bit.ly/ProfDaveAPChem
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Check out "Is This Wi-Fi Organic?", my book on disarming pseudoscience!
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क्या होगा अगर आपने यूरेनियम खा लिया तो ? // What will Happen If You Eat Uranium ? Science . .
Uranium is a chemical element with symbol U and atomic number 92. It is a silvery-grey metal in the actinide series of the periodic table. A uranium atom has 92 protons and 92 electrons, of which 6 are valence electrons. Uranium is weakly radioactive because all isotopes of uranium are unstable, with half-lives varying between 159,200 years and 4.5 billion years. The most common isotopes in natural uranium are uranium-238 (which has 146 neutrons and accounts for over 99%) and uranium-235 (which has 143 neutrons). Uranium has the highest atomic weight of the primordially occurring elements. Its density is about 70% higher than that of lead, and slightly lower than that of gold or tungsten. It occurs naturally in low concentrations of a few parts per million in soil, rock and water, and is commercially extracted from uranium-bearing minerals such as uraninite.
In nature, uranium is found as uranium-238 (99.2739–99.2752%), uranium-235 (0.7198–0.7202%), and a very small amount of uranium-234 (0.0050–0.0059%). Uranium decays slowly by emitting an alpha particle. The half-life of uranium-238 is about 4.47 billion years and that of uranium-235 is 704 million years, making them useful in dating the age of the Earth.
Many contemporary uses of uranium exploit its unique nuclear properties. Uranium-235 is the only naturally occurring fissile isotope, which makes it widely used in nuclear power plants and nuclear weapons. However, because of the tiny amounts found in nature, uranium needs to undergo enrichment so that enough uranium-235 is present. Uranium-238 is fissionable by fast neutrons, and is fertile, meaning it can be transmuted to fissile plutonium-239 in a nuclear reactor. Another fissile isotope, uranium-233, can be produced from natural thorium and is also important in nuclear technology. Uranium-238 has a small probability for spontaneous fission or even induced fission with fast neutrons; uranium-235 and to a lesser degree uranium-233 have a much higher fission cross-section for slow neutrons. In sufficient concentration, these isotopes maintain a sustained nuclear chain reaction. This generates the heat in nuclear power reactors, and produces the fissile material for nuclear weapons. Depleted uranium (238U) is used in kinetic energy penetrators and armor plating. Uranium is used as a colorant in uranium glass, producing lemon yellow to green colors. Uranium glass fluoresces green in ultraviolet light. It was also used for tinting and shading in early photography.
What Happens If You Eat Uranium, amazing chemical reactions, chemistry
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Copyright Disclaimer Under Section 107 of the Copyright Act 1976, allowance is made for "fair use" for purposes such as criticism, comment, news reporting, teaching, scholarship, and research. Fair use is a use permitted by copyright statute that might otherwise be infringing. Non-profit, educational or personal use tips the balance in favor of fair use.
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Uranium-238
Uranium-238 (238U or U-238) is the most common isotope of uranium found in nature.It is not fissile, but is a fertile material: it can capture a slow neutron and after two beta decays become fissile plutonium-239.
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Author: Forwardbias
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Image Source: https://en.wikipedia.org/wiki/File:Uranium03.jpg
=======Image-Copyright-Info========
-Video is targeted to blind users
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Article text available under CC-BY-SA
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this video is about uranium ore, pitchblende - and the natural (radio-)isotope mix that comes with it.
uranium is indeed an alpha emitter - but don't be fooled, this is not the only radiation emitted by uranium ore! there are alpha and beta particles, gamma rays, and even neutrons...
Uranium 238 depicts the hazards that the use of depleted uranium or DU in conventional weapons poses for the health of soldiers and civilians. Through interviews with soldiers, scientists and activists, the documentary explores the health hazards when this radioactive and toxic material is ingested or inhaled by people in the battle fields and shooting ranges. Based in scientific data this video has been used by the International Coalition to Ban Uranium Weapons (ICBUW) as part of its international campaign to prohibit DU as a military component.
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