In 1897, Thomson showed that cathode rays were composed of previously unknown negatively charged particles, which he calculated must have bodies much smaller than atoms and a very large value for their charge-to-mass ratio. Thus he is credited with the discovery and identification of the electron; and with the discovery of the first subatomic particle. Thomson is also credited with finding the first evidence for isotopes of a stable (non-radioactive) element in 1913, as part of his exploration into the composition of canal rays (positive ions). His experiments to determine the nature of positively charged particles, with Francis William Aston, were the first use of mass spectrometry and led to the development of the mass spectrograph.
In 1897, J.J. Thomson discovered the electron, the first subatomic particle.
In 1904, Thomson proposed atomic model where electrons are embedded within spherically distributed, positive charge (so-called "plum pudding" model).Both the positive charge and the mass of the atom would be more or less uniformly distributed over its size.
published: 08 Oct 2014
Experimento de J.J. Thomson
Muestra de animación educativa dirigida a la educación científica de la enseñanza obligatoria.
Este vídeo es el segundo de una serie de animaciones sobre la estructura atómica de la materia que culmina con los experimentos de Rutherford. En esta serie, los vídeos se dejan abiertos para fomentar la reflexión.
**Propuestas de actividades**
Tras ver el vídeo, por parejas, discutid las siguientes cuestiones:
¿Qué pasaría si no se hubiera agujereado el cátodo?
¿Hacia dónde se curva el haz? ¿Qué podemos inferir, por tanto, de la naturaleza eléctrica de los rayos catódicos?
¿Por qué se prueba con diferentes metales en el ánodo? ¿Qué se observa al hacerlo? ¿Qué podemos deducir de estos resultados?
Poned en común con el resto de la clase vuestras respuestas.
Si se utiliza este vídeo de m...
published: 27 Feb 2017
JJ Thomson and the discovery of the electron
In this video I review, with the physics explained, how JJ Thomson discovered the electron
I briefly review the history prior and also discuss electric fields, magnetic fields and circular motion and how they all contribute to JJ Thomson's discovery
Like what I do? Support by buying me a coffee - www.buymeacoffee.com/physicshigh
Subscribe - www.youtube.com/c/physicshigh
For on going support, support me at Patreon: www.patreon.com/physicshigh
LIKE and SHARE with your peers. And please add a COMMENT to let me know I have helped you.
Physics High is committed to producing content that teaches physics concepts at a level a high schooler can understand.
See www.physicshigh.com for all my videos and other resources.
As well as this I produce a podcast series called Deep Impact - intervi...
published: 17 Apr 2017
Cathode Rays Lead to Thomson's Model of the Atom
In the mid 1800's scientists successfully passed an electric current through a vacuum in a glass tube. They saw a glow from the tube that seemed to emanate from the negatively charged plate called the cathode. Since scientists didn't know what the glow was they called it a cathode ray. There was debate over whether the cathode ray was a wave phenomenon like light or a stream of negatively charged particles. JJ Thomson effectively resolved the debate in 1897 by performing a clever experiment that determined the charge to mass ratio of the particles making up the cathode ray. He also showed that this same particle was in all different cathode materials so it must be a constituent common to all atoms. This changed our understanding of the atom from the previous billiard ball model to Thomson'...
published: 02 Feb 2011
Discovery of the Electron: Cathode Ray Tube Experiment
To see all my Chemistry videos, check out
http://socratic.org/chemistry
J.J. Thompson discovered the electron, the first of the subatomic particles, using the cathode ray tube experiment. He found that many different metals release cathode rays, and that cathode rays were made of electrons, very small negatively charged particles. This disproved John Dalton's theory of the atom, and Thompson came up with the plum pudding model of the atom.
published: 28 Nov 2012
J.J. Thomson and His Discovery of the Electron
Each generation benefits from the insights and discoveries of those who came before. “If I have seen a little further it is by standing on the shoulders of Giants,” wrote Isaac Newton. In a new annual series, World Science Festival audiences are invited to stand on the shoulders of modern-day giants. Continuing from his argument for the support of pure science as well as practical science, physicist Steven Weinberg offers examples in the past where pure, knowledge-driven endeavors have yielded practical, and sometimes revolutionary, discoveries.
Watch the Full Program Here: http://youtu.be/5GrjjCVk6cA
Original Program Date: June 4, 2011
The World Science Festival gathers great minds in science and the arts to produce live and digital content that allows a broad general audience to engag...
published: 20 Feb 2015
JJ Thomson Cathode Ray Tube Experiment: the Discovery of the Electron
In 1897, JJ Thomson discovered the electron in his famous cathode ray tube experiment. How did it work and why did Thomson do the experiment in the first place? Watch the video and find out!
As usual a big thank you to the fabulous Kim Nalley for her background music and her version of Schoolhouse Rock's "Electricity, Electricity" for my intro song.
published: 26 Nov 2018
Chemistry_Class 9th_Chapter 4_Structure of the Atom_Module-Thomson's Atomic Model
In 1897, J.J. Thomson discovered the electron, the first subatomic particle.
In 1904, Thomson proposed atomic model where electrons are embedded within spheric...
In 1897, J.J. Thomson discovered the electron, the first subatomic particle.
In 1904, Thomson proposed atomic model where electrons are embedded within spherically distributed, positive charge (so-called "plum pudding" model).Both the positive charge and the mass of the atom would be more or less uniformly distributed over its size.
In 1897, J.J. Thomson discovered the electron, the first subatomic particle.
In 1904, Thomson proposed atomic model where electrons are embedded within spherically distributed, positive charge (so-called "plum pudding" model).Both the positive charge and the mass of the atom would be more or less uniformly distributed over its size.
Muestra de animación educativa dirigida a la educación científica de la enseñanza obligatoria.
Este vídeo es el segundo de una serie de animaciones sobre la es...
Muestra de animación educativa dirigida a la educación científica de la enseñanza obligatoria.
Este vídeo es el segundo de una serie de animaciones sobre la estructura atómica de la materia que culmina con los experimentos de Rutherford. En esta serie, los vídeos se dejan abiertos para fomentar la reflexión.
**Propuestas de actividades**
Tras ver el vídeo, por parejas, discutid las siguientes cuestiones:
¿Qué pasaría si no se hubiera agujereado el cátodo?
¿Hacia dónde se curva el haz? ¿Qué podemos inferir, por tanto, de la naturaleza eléctrica de los rayos catódicos?
¿Por qué se prueba con diferentes metales en el ánodo? ¿Qué se observa al hacerlo? ¿Qué podemos deducir de estos resultados?
Poned en común con el resto de la clase vuestras respuestas.
Si se utiliza este vídeo de manera independiente, se puede realizar una búsqueda sobre qué descubrió realmente Thomson y sobre el modelo de átomo que postuló. Estos conceptos se trabajan con mayor profundidad en vídeos posteriores.
**Más información**
Eduscopi es una empresa de educación y divulgación científica especializada en el diseño de proyectos, recursos y actividades.
Visita nuestra página https://www.eduscopi.com/
**Síguenos en**
Twitter: @eduscopi
Facebook: https://www.facebook.com/eduscopi/
Linkedin: https://www.linkedin.com/company/eduscopi
Muestra de animación educativa dirigida a la educación científica de la enseñanza obligatoria.
Este vídeo es el segundo de una serie de animaciones sobre la estructura atómica de la materia que culmina con los experimentos de Rutherford. En esta serie, los vídeos se dejan abiertos para fomentar la reflexión.
**Propuestas de actividades**
Tras ver el vídeo, por parejas, discutid las siguientes cuestiones:
¿Qué pasaría si no se hubiera agujereado el cátodo?
¿Hacia dónde se curva el haz? ¿Qué podemos inferir, por tanto, de la naturaleza eléctrica de los rayos catódicos?
¿Por qué se prueba con diferentes metales en el ánodo? ¿Qué se observa al hacerlo? ¿Qué podemos deducir de estos resultados?
Poned en común con el resto de la clase vuestras respuestas.
Si se utiliza este vídeo de manera independiente, se puede realizar una búsqueda sobre qué descubrió realmente Thomson y sobre el modelo de átomo que postuló. Estos conceptos se trabajan con mayor profundidad en vídeos posteriores.
**Más información**
Eduscopi es una empresa de educación y divulgación científica especializada en el diseño de proyectos, recursos y actividades.
Visita nuestra página https://www.eduscopi.com/
**Síguenos en**
Twitter: @eduscopi
Facebook: https://www.facebook.com/eduscopi/
Linkedin: https://www.linkedin.com/company/eduscopi
In this video I review, with the physics explained, how JJ Thomson discovered the electron
I briefly review the history prior and also discuss electric fields, ...
In this video I review, with the physics explained, how JJ Thomson discovered the electron
I briefly review the history prior and also discuss electric fields, magnetic fields and circular motion and how they all contribute to JJ Thomson's discovery
Like what I do? Support by buying me a coffee - www.buymeacoffee.com/physicshigh
Subscribe - www.youtube.com/c/physicshigh
For on going support, support me at Patreon: www.patreon.com/physicshigh
LIKE and SHARE with your peers. And please add a COMMENT to let me know I have helped you.
Physics High is committed to producing content that teaches physics concepts at a level a high schooler can understand.
See www.physicshigh.com for all my videos and other resources.
As well as this I produce a podcast series called Deep Impact - interviews with science communicators as to what they do, what drives them to communicate their craft
You will find these on the channel and also on podcast sites such as Spotify, Apple and Google podcasts
👥 Social
---------------------------------------------------------
Follow me on
facebook: @physicshigh
twitter: @physicshigh
Instagram: @physicshigh
In this video I review, with the physics explained, how JJ Thomson discovered the electron
I briefly review the history prior and also discuss electric fields, magnetic fields and circular motion and how they all contribute to JJ Thomson's discovery
Like what I do? Support by buying me a coffee - www.buymeacoffee.com/physicshigh
Subscribe - www.youtube.com/c/physicshigh
For on going support, support me at Patreon: www.patreon.com/physicshigh
LIKE and SHARE with your peers. And please add a COMMENT to let me know I have helped you.
Physics High is committed to producing content that teaches physics concepts at a level a high schooler can understand.
See www.physicshigh.com for all my videos and other resources.
As well as this I produce a podcast series called Deep Impact - interviews with science communicators as to what they do, what drives them to communicate their craft
You will find these on the channel and also on podcast sites such as Spotify, Apple and Google podcasts
👥 Social
---------------------------------------------------------
Follow me on
facebook: @physicshigh
twitter: @physicshigh
Instagram: @physicshigh
In the mid 1800's scientists successfully passed an electric current through a vacuum in a glass tube. They saw a glow from the tube that seemed to emanate from...
In the mid 1800's scientists successfully passed an electric current through a vacuum in a glass tube. They saw a glow from the tube that seemed to emanate from the negatively charged plate called the cathode. Since scientists didn't know what the glow was they called it a cathode ray. There was debate over whether the cathode ray was a wave phenomenon like light or a stream of negatively charged particles. JJ Thomson effectively resolved the debate in 1897 by performing a clever experiment that determined the charge to mass ratio of the particles making up the cathode ray. He also showed that this same particle was in all different cathode materials so it must be a constituent common to all atoms. This changed our understanding of the atom from the previous billiard ball model to Thomson's plum pudding model of the atom.
In the mid 1800's scientists successfully passed an electric current through a vacuum in a glass tube. They saw a glow from the tube that seemed to emanate from the negatively charged plate called the cathode. Since scientists didn't know what the glow was they called it a cathode ray. There was debate over whether the cathode ray was a wave phenomenon like light or a stream of negatively charged particles. JJ Thomson effectively resolved the debate in 1897 by performing a clever experiment that determined the charge to mass ratio of the particles making up the cathode ray. He also showed that this same particle was in all different cathode materials so it must be a constituent common to all atoms. This changed our understanding of the atom from the previous billiard ball model to Thomson's plum pudding model of the atom.
To see all my Chemistry videos, check out
http://socratic.org/chemistry
J.J. Thompson discovered the electron, the first of the subatomic particles, using the ...
To see all my Chemistry videos, check out
http://socratic.org/chemistry
J.J. Thompson discovered the electron, the first of the subatomic particles, using the cathode ray tube experiment. He found that many different metals release cathode rays, and that cathode rays were made of electrons, very small negatively charged particles. This disproved John Dalton's theory of the atom, and Thompson came up with the plum pudding model of the atom.
To see all my Chemistry videos, check out
http://socratic.org/chemistry
J.J. Thompson discovered the electron, the first of the subatomic particles, using the cathode ray tube experiment. He found that many different metals release cathode rays, and that cathode rays were made of electrons, very small negatively charged particles. This disproved John Dalton's theory of the atom, and Thompson came up with the plum pudding model of the atom.
Each generation benefits from the insights and discoveries of those who came before. “If I have seen a little further it is by standing on the shoulders of Gian...
Each generation benefits from the insights and discoveries of those who came before. “If I have seen a little further it is by standing on the shoulders of Giants,” wrote Isaac Newton. In a new annual series, World Science Festival audiences are invited to stand on the shoulders of modern-day giants. Continuing from his argument for the support of pure science as well as practical science, physicist Steven Weinberg offers examples in the past where pure, knowledge-driven endeavors have yielded practical, and sometimes revolutionary, discoveries.
Watch the Full Program Here: http://youtu.be/5GrjjCVk6cA
Original Program Date: June 4, 2011
The World Science Festival gathers great minds in science and the arts to produce live and digital content that allows a broad general audience to engage with scientific discoveries. Our mission is to cultivate a general public informed by science, inspired by its wonder, convinced of its value, and prepared to engage with its implications for the future.
Subscribe to our YouTube Channel for all the latest from WSF.
Visit our Website: http://www.worldsciencefestival.com/
Like us on Facebook: https://www.facebook.com/worldsciencefestival
Follow us on twitter: https://twitter.com/WorldSciFest
Each generation benefits from the insights and discoveries of those who came before. “If I have seen a little further it is by standing on the shoulders of Giants,” wrote Isaac Newton. In a new annual series, World Science Festival audiences are invited to stand on the shoulders of modern-day giants. Continuing from his argument for the support of pure science as well as practical science, physicist Steven Weinberg offers examples in the past where pure, knowledge-driven endeavors have yielded practical, and sometimes revolutionary, discoveries.
Watch the Full Program Here: http://youtu.be/5GrjjCVk6cA
Original Program Date: June 4, 2011
The World Science Festival gathers great minds in science and the arts to produce live and digital content that allows a broad general audience to engage with scientific discoveries. Our mission is to cultivate a general public informed by science, inspired by its wonder, convinced of its value, and prepared to engage with its implications for the future.
Subscribe to our YouTube Channel for all the latest from WSF.
Visit our Website: http://www.worldsciencefestival.com/
Like us on Facebook: https://www.facebook.com/worldsciencefestival
Follow us on twitter: https://twitter.com/WorldSciFest
In 1897, JJ Thomson discovered the electron in his famous cathode ray tube experiment. How did it work and why did Thomson do the experiment in the first place...
In 1897, JJ Thomson discovered the electron in his famous cathode ray tube experiment. How did it work and why did Thomson do the experiment in the first place? Watch the video and find out!
As usual a big thank you to the fabulous Kim Nalley for her background music and her version of Schoolhouse Rock's "Electricity, Electricity" for my intro song.
In 1897, JJ Thomson discovered the electron in his famous cathode ray tube experiment. How did it work and why did Thomson do the experiment in the first place? Watch the video and find out!
As usual a big thank you to the fabulous Kim Nalley for her background music and her version of Schoolhouse Rock's "Electricity, Electricity" for my intro song.
In 1897, J.J. Thomson discovered the electron, the first subatomic particle.
In 1904, Thomson proposed atomic model where electrons are embedded within spherically distributed, positive charge (so-called "plum pudding" model).Both the positive charge and the mass of the atom would be more or less uniformly distributed over its size.
Muestra de animación educativa dirigida a la educación científica de la enseñanza obligatoria.
Este vídeo es el segundo de una serie de animaciones sobre la estructura atómica de la materia que culmina con los experimentos de Rutherford. En esta serie, los vídeos se dejan abiertos para fomentar la reflexión.
**Propuestas de actividades**
Tras ver el vídeo, por parejas, discutid las siguientes cuestiones:
¿Qué pasaría si no se hubiera agujereado el cátodo?
¿Hacia dónde se curva el haz? ¿Qué podemos inferir, por tanto, de la naturaleza eléctrica de los rayos catódicos?
¿Por qué se prueba con diferentes metales en el ánodo? ¿Qué se observa al hacerlo? ¿Qué podemos deducir de estos resultados?
Poned en común con el resto de la clase vuestras respuestas.
Si se utiliza este vídeo de manera independiente, se puede realizar una búsqueda sobre qué descubrió realmente Thomson y sobre el modelo de átomo que postuló. Estos conceptos se trabajan con mayor profundidad en vídeos posteriores.
**Más información**
Eduscopi es una empresa de educación y divulgación científica especializada en el diseño de proyectos, recursos y actividades.
Visita nuestra página https://www.eduscopi.com/
**Síguenos en**
Twitter: @eduscopi
Facebook: https://www.facebook.com/eduscopi/
Linkedin: https://www.linkedin.com/company/eduscopi
In this video I review, with the physics explained, how JJ Thomson discovered the electron
I briefly review the history prior and also discuss electric fields, magnetic fields and circular motion and how they all contribute to JJ Thomson's discovery
Like what I do? Support by buying me a coffee - www.buymeacoffee.com/physicshigh
Subscribe - www.youtube.com/c/physicshigh
For on going support, support me at Patreon: www.patreon.com/physicshigh
LIKE and SHARE with your peers. And please add a COMMENT to let me know I have helped you.
Physics High is committed to producing content that teaches physics concepts at a level a high schooler can understand.
See www.physicshigh.com for all my videos and other resources.
As well as this I produce a podcast series called Deep Impact - interviews with science communicators as to what they do, what drives them to communicate their craft
You will find these on the channel and also on podcast sites such as Spotify, Apple and Google podcasts
👥 Social
---------------------------------------------------------
Follow me on
facebook: @physicshigh
twitter: @physicshigh
Instagram: @physicshigh
In the mid 1800's scientists successfully passed an electric current through a vacuum in a glass tube. They saw a glow from the tube that seemed to emanate from the negatively charged plate called the cathode. Since scientists didn't know what the glow was they called it a cathode ray. There was debate over whether the cathode ray was a wave phenomenon like light or a stream of negatively charged particles. JJ Thomson effectively resolved the debate in 1897 by performing a clever experiment that determined the charge to mass ratio of the particles making up the cathode ray. He also showed that this same particle was in all different cathode materials so it must be a constituent common to all atoms. This changed our understanding of the atom from the previous billiard ball model to Thomson's plum pudding model of the atom.
To see all my Chemistry videos, check out
http://socratic.org/chemistry
J.J. Thompson discovered the electron, the first of the subatomic particles, using the cathode ray tube experiment. He found that many different metals release cathode rays, and that cathode rays were made of electrons, very small negatively charged particles. This disproved John Dalton's theory of the atom, and Thompson came up with the plum pudding model of the atom.
Each generation benefits from the insights and discoveries of those who came before. “If I have seen a little further it is by standing on the shoulders of Giants,” wrote Isaac Newton. In a new annual series, World Science Festival audiences are invited to stand on the shoulders of modern-day giants. Continuing from his argument for the support of pure science as well as practical science, physicist Steven Weinberg offers examples in the past where pure, knowledge-driven endeavors have yielded practical, and sometimes revolutionary, discoveries.
Watch the Full Program Here: http://youtu.be/5GrjjCVk6cA
Original Program Date: June 4, 2011
The World Science Festival gathers great minds in science and the arts to produce live and digital content that allows a broad general audience to engage with scientific discoveries. Our mission is to cultivate a general public informed by science, inspired by its wonder, convinced of its value, and prepared to engage with its implications for the future.
Subscribe to our YouTube Channel for all the latest from WSF.
Visit our Website: http://www.worldsciencefestival.com/
Like us on Facebook: https://www.facebook.com/worldsciencefestival
Follow us on twitter: https://twitter.com/WorldSciFest
In 1897, JJ Thomson discovered the electron in his famous cathode ray tube experiment. How did it work and why did Thomson do the experiment in the first place? Watch the video and find out!
As usual a big thank you to the fabulous Kim Nalley for her background music and her version of Schoolhouse Rock's "Electricity, Electricity" for my intro song.
In 1897, Thomson showed that cathode rays were composed of previously unknown negatively charged particles, which he calculated must have bodies much smaller than atoms and a very large value for their charge-to-mass ratio. Thus he is credited with the discovery and identification of the electron; and with the discovery of the first subatomic particle. Thomson is also credited with finding the first evidence for isotopes of a stable (non-radioactive) element in 1913, as part of his exploration into the composition of canal rays (positive ions). His experiments to determine the nature of positively charged particles, with Francis William Aston, were the first use of mass spectrometry and led to the development of the mass spectrograph.
. <span style="font-family ... Sent twice a week ... The physicist JJThomson — another Nobel winner — famously and erroneously proposed that atoms lacked a nucleus, but that doesn’t make his previous discovery of the electron any less important ... .