Group
Period
1
2
3
4
5
6
7
1
1H
3Li
11Na
19K
37Rb
55Cs
87Fr
2
4Be
12Mg
20Ca
38Sr
56Ba
88Ra
*
**
*
**
3
21Sc
39Y
71Lu
103Lr
57La
89Ac
4
22Ti
40Zr
72Hf
104Rf
58Ce
90Th
5
23V
41Nb
73Ta
105Db
59Pr
91Pa
6
24Cr
42Mo
74W
106Sg
60Nd
92U
7
25Mn
43Tc
75Re
107Bh
61Pm
93Np
8
26Fe
44Ru
76Os
108Hs
62Sm
94Pu
9
27Co
45Rh
77Ir
109Mt
63Eu
95Am
10
28Ni
46Pd
78Pt
110Ds
64Gd
96Cm
11
29Cu
47Ag
79Au
111Rg
65Tb
97Bk
12
30Zn
48Cd
80Hg
112Cn
66Dy
98Cf
13
5B
13Al
31Ga
49In
81Tl
113Nh
67Ho
99Es
14
6C
14Si
32Ge
50Sn
82Pb
114Fl
68Er
100Fm
15
7N
15P
33As
51Sb
83Bi
115Mc
69Tm
101Md
16
8O
16S
34Se
52Te
84Po
116Lv
70Yb
102No
17
9F
17Cl
35Br
53I
85At
117Ts
18
2He
10Ne
18Ar
36Kr
54Xe
86Rn
118Og