| Group
| 1
| 2
|
| 3
| 4
| 5
| 6
| 7
| 8
| 9
| 10
| 11
| 12
| 13
| 14
| 15
| 16
| 17
| 18
|
| IA
| IIA
|
| IIIB
| IVB
| VB
| VIB
| VIIB
| ----
| VIIIB
| ----
| IB
| IIB
| IIIA
| IVA
| VA
| VIA
| VIIA
| VIIIA
|
| Period
|
|
1
1s
| 1
H
1
|
| 2
He
2
|
2
2s
2p
| 3
Li
1
| 4
Be
2
|
| 5
B
2
1
| 6
C
2
2
| 7
N
2
3
| 8
O
2
4
| 9
F
2
5
| 10
Ne
2
6
|
3
3s
3p
| 11
Na
1
| 12
Mg
2
|
| 13
Al
2
1
| 14
Si
2
2
| 15
P
2
3
| 16
S
2
4
| 17
Cl
2
5
| 18
Ar
2
6
|
4
4s
3d
4p
| 19
K
1
| 20
Ca
2
|
| 21
Sc
2
1
| 22
Ti
2
2
| 23
V
2
3
| 24
Cr
1
5
| 25
Mn
2
5
| 26
Fe
2
6
| 27
Co
2
7
| 28
Ni
2
8
| 29
Cu
1
10
| 30
Zn
2
10
| 31
Ga
2
10
1
| 32
Ge
2
10
2
| 33
As
2
10
3
| 34
Se
2
10
4
| 35
Br
2
10
5
| 36
Kr
2
10
6
|
5
5s
4d
5p
| 37
Rb
1
| 38
Sr
2
|
| 39
Y
2
1
| 40
Zr
2
2
| 41
Nb
1
4
| 42
Mo
2
4
| (43)
Tc
2
5
| 44
Ru
2
6
| 45
Rh
2
7
| 46
Pd
0
10
| 47
Ag
1
10
| 48
Cd
2
10
| 49
In
2
10
1
| 50
Sn
2
10
2
| 51
Sb
2
10
3
| 52
Te
2
10
4
| 53
I
2
10
5
| 54
Xe
2
10
6
|
6
6s
4f
5d
6p
| 55
Cs
1
| 56
Ba
2
| *
| 71
Lu
2
14
1
| 72
Hf
2
14
2
| 73
Ta
2
14
3
| 74
W
2
14
4
| 75
Re
2
14
5
| 76
Os
2
14
6
| 77
Ir
2
14
7
| 78
Pt
1
14
9
| 79
Au
1
14
10
| 80
Hg
2
14
10
| 81
Tl
2
14
10
1
| 82
Pb
2
14
10
2
| 83
Bi
2
14
10
3
| 84
Po
2
14
10
4
| 85
At
2
14
10
5
| 86
Rn
2
14
10
6
|
7
7s
5f
6d
7p
| 87
Fr
1
| 88
Ra
2
| **
| (103)
Lr
2
14
1
| (104)
Rf
2
14
2
| (105)
Db
2
14
3
| (106)
Sg
2
14
4
| (107)
Bh
2
14
5
| (108)
Hs
2
14
6
| (109)
Mt
2
14
7
| (110)
Ds
2
14
8
| (111)
Rg
2
14
9
| (112)
Uub
2
14
10
| (113)
Uut
2
14
10
1
| (114)
Uuq
2
14
10
2
| (115)
Uup
2
14
10
3
| (116)
Uuh
2
14
10
4
| (117)
Uus
2
14
10
5
| (118)
Uuo
2
14
10
6
|
* Lanthanides
6s
4f
5d
| 57
La
2
1
| 58
Ce
2
2
0
| 59
Pr
2
3
0
| 60
Nd
2
4
0
| (61)
Pm
2
5
0
| 62
Sm
2
6
0
| 63
Eu
2
7
0
| 64
Gd
2
7
1
| 65
Tb
2
9
0
| 66
Dy
2
10
0
| 67
Ho
2
11
0
| 68
Er
2
12
0
| 69
Tm
2
13
0
| 70
Yb
2
14
0
|
** Actinides
7s
5f
6d
| 89
Ac
2
1
| 90
Th
2
0
2
| 91
Pa
2
2
1
| 92
U
2
3
1
| (93)
Np
2
4
1
| (94)
Pu
2
6
0
| (95)
Am
2
7
0
| (96)
Cm
2
7
1
| (97)
Bk
2
9
0
| (98)
Cf
2
10
0
| (99)
Es
2
11
0
| (100)
Fm
2
12
0
| (101)
Md
2
13
0
| (102)
No
2
14
0
|