Chemical elements: electron-configuration and term symbol
|
Element
|
Group
|
Electron configuration
|
(P8000)
|
Term symbol
|
note
|
|
|
|
|
|
|
1, 2,
|
S, P,
|
|
1
|
H
|
hydrogen
|
1
|
1s1
|
1s¹
|
2S1/2
|
S2S1/2
|
|
2
|
He
|
helium
|
18
|
1s2
|
1s²
|
1S0
|
S1S0
|
|
3
|
Li
|
lithium
|
1
|
[He] 2s1
|
1s² 2s¹, [He] 2s¹
|
2S1/2
|
S2S1/2
|
|
4
|
Be
|
beryllium
|
2
|
[He] 2s2
|
1s² 2s², [He] 2s²
|
1S0
|
S1S0
|
|
5
|
B
|
boron
|
13
|
[He] 2s2 2p1
|
1s² 2s² 2p¹, [He] 2s² 2p¹
|
2P1/2
|
P2P1/2
|
|
6
|
C
|
carbon
|
14
|
[He] 2s2 2p2
|
1s² 2s² 2p², [He] 2s² 2p²
|
3P0
|
P3P0
|
|
7
|
N
|
nitrogen
|
15
|
[He] 2s2 2p3
|
1s² 2s² 2p³, [He] 2s² 2p³
|
4S3/2
|
S4S3/2
|
|
8
|
O
|
oxygen
|
16
|
[He] 2s2 2p4
|
[He] 2s² 2p⁴, 1s² 2s² 2p⁴
|
3P2
|
P3P2
|
|
9
|
F
|
fluorine
|
17
|
[He] 2s2 2p5
|
1s² 2s² 2p⁵, [He] 2s² 2p⁵
|
2P3/2
|
P2P3/2
|
|
10
|
Ne
|
neon
|
18
|
[He] 2s2 2p6
|
1s² 2s² 2p⁶, [He] 2s² 2p⁶
|
1S0
|
S1S0
|
|
11
|
Na
|
sodium
|
1
|
[Ne] 3s1
|
1s² 2s² 2p⁶ 3s¹, [Ne] 3s¹
|
2S1/2
|
S2S1/2
|
|
12
|
Mg
|
magnesium
|
2
|
[Ne] 3s2
|
1s² 2s² 2p⁶ 3s², [Ne] 3s²
|
1S0
|
S1S0
|
|
13
|
Al
|
aluminium
|
13
|
[Ne] 3s2 3p1
|
[Ne] 3s² 3p¹, 1s² 2s² 2p⁶ 3s² 3p¹
|
2P1/2
|
P2P1/2
|
|
14
|
Si
|
silicon
|
14
|
[Ne] 3s2 3p2
|
1s² 2s² 2p⁶ 3s² 3p², [Ne] 3s² 3p²
|
3P0
|
P3P0
|
|
15
|
P
|
phosphorus
|
15
|
[Ne] 3s2 3p3
|
1s² 2s² 2p⁶ 3s² 3p³, [Ne] 3s² 3p³
|
4S3/2
|
S4S3/2
|
|
16
|
S
|
sulfur
|
16
|
[Ne] 3s2 3p4
|
[Ne] 3s² 3p⁴, 1s² 2s² 2p⁶ 3s² 3p⁴
|
3P2
|
P3P2
|
|
17
|
Cl
|
chlorine
|
17
|
[Ne] 3s2 3p5
|
[Ne] 3s² 3p⁵, 1s² 2s² 2p⁶ 3s² 3p⁵
|
2P3/2
|
P2P3/2
|
|
18
|
Ar
|
argon
|
18
|
[Ne] 3s2 3p6
|
1s² 2s² 2p⁶ 3s² 3p⁶, [Ne] 3s² 3p⁶
|
1S0
|
S1S0
|
|
19
|
K
|
potassium
|
1
|
[Ar] 4s1
|
[Ar] 4s¹, 1s² 2s² 2p⁶ 3s² 3p⁶ 4s¹
|
2S1/2
|
S2S1/2
|
|
20
|
Ca
|
calcium
|
2
|
[Ar] 4s2
|
[Ar] 4s², 1s² 2s² 2p⁶ 3s² 3p⁶ 4s²
|
1S0
|
S1S0
|
|
21
|
Sc
|
scandium
|
3
|
[Ar] 3d1 4s2
|
[Ar] 3d¹ 4s², 1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹ 4s²
|
2D3/2
|
D2D3/2
|
|
22
|
Ti
|
titanium
|
4
|
[Ar] 3d2 4s2
|
[Ar] 3d² 4s²
|
3F2
|
F3F2
|
|
23
|
V
|
vanadium
|
5
|
[Ar] 3d3 4s2
|
[Ar] 3d³ 4s²
|
4F3/2
|
F4F3/2
|
|
24
|
Cr
|
chromium
|
6
|
[Ar] 3d5 4s1
|
[Ar] 3d⁵ 4s¹
|
7S3
|
S7S3
|
|
25
|
Mn
|
manganese
|
7
|
[Ar] 3d5 4s2
|
[Ar] 3d⁵ 4s²
|
6S5/2
|
S6S5/2
|
|
26
|
Fe
|
iron
|
8
|
[Ar] 3d6 4s2
|
[Ar] 3d⁶ 4s²
|
5D4
|
D5D4
|
|
27
|
Co
|
cobalt
|
9
|
[Ar] 3d7 4s2
|
[Ar] 3d⁷ 4s²
|
4F9/2
|
F4F9/2
|
|
28
|
Ni
|
nickel
|
10
|
[Ar] 3d8 4s2 or [Ar] 3d9 4s1
|
|
3F4
|
F3F4
|
|
29
|
Cu
|
copper
|
11
|
[Ar] 3d10 4s1
|
|
2S1/2
|
S2S1/2
|
|
30
|
Zn
|
zinc
|
12
|
[Ar] 3d10 4s2
|
|
1S0
|
S1S0
|
|
31
|
Ga
|
gallium
|
13
|
[Ar] 3d10 4s2 4p1
|
|
2P1/2
|
P2P1/2
|
|
32
|
Ge
|
germanium
|
14
|
[Ar] 3d10 4s2 4p2
|
|
3P0
|
P3P0
|
|
33
|
As
|
arsenic
|
15
|
[Ar] 3d10 4s2 4p3
|
|
4S3/2
|
S4S3/2
|
|
34
|
Se
|
selenium
|
16
|
[Ar] 3d10 4s2 4p4
|
|
3P2
|
P3P2
|
|
35
|
Br
|
bromine
|
17
|
[Ar] 3d10 4s2 4p5
|
|
2P3/2
|
P2P3/2
|
|
36
|
Kr
|
krypton
|
18
|
[Ar] 3d10 4s2 4p6
|
1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁶, [Ar] 3d¹⁰ 4s² 4p⁶
|
1S0
|
S1S0
|
|
37
|
Rb
|
rubidium
|
1
|
[Kr] 5s1
|
[Kr] 5s¹
|
2S1/2
|
S2S1/2
|
|
38
|
Sr
|
strontium
|
2
|
[Kr] 5s2
|
[Kr] 5s²
|
1S0
|
S1S0
|
|
39
|
Y
|
yttrium
|
3
|
[Kr] 4d1 5s2
|
[Kr] 4d¹ 5s²
|
2D3/2
|
D2D3/2
|
|
40
|
Zr
|
zirconium
|
4
|
[Kr] 4d2 5s2
|
[Kr] 4d² 5s²
|
3F2
|
F3F2
|
|
41
|
Nb
|
niobium
|
5
|
[Kr] 4d4 5s1
|
[Kr] 4d⁴ 5s¹
|
6D1/2
|
D6D1/2
|
|
42
|
Mo
|
molybdenum
|
6
|
[Kr] 4d5 5s1
|
[Kr] 4d⁵ 5s¹
|
7S3
|
S7S3
|
|
43
|
Tc
|
technetium
|
7
|
[Kr] 4d5 5s2
|
[Kr] 4d⁵ 5s²
|
6S5/2
|
S6S5/2
|
|
44
|
Ru
|
ruthenium
|
8
|
[Kr] 4d7 5s1
|
[Kr] 4d⁷ 5s¹
|
5F5
|
F5F5
|
|
45
|
Rh
|
rhodium
|
9
|
[Kr] 4d8 5s1
|
[Kr] 4d⁸ 5s¹
|
4F9/2
|
F4F9/2
|
|
46
|
Pd
|
palladium
|
10
|
[Kr] 4d10
|
|
1S0
|
S1S0
|
|
47
|
Ag
|
silver
|
11
|
[Kr] 4d10 5s1
|
|
2S1/2
|
S2S1/2
|
|
48
|
Cd
|
cadmium
|
12
|
[Kr] 4d10 5s2
|
|
1S0
|
S1S0
|
|
49
|
In
|
indium
|
13
|
[Kr] 4d10 5s2 5p1
|
|
2P1/2
|
P2P1/2
|
|
50
|
Sn
|
tin
|
14
|
[Kr] 4d10 5s2 5p2
|
|
3P0
|
P3P0
|
|
51
|
Sb
|
antimony
|
15
|
[Kr] 4d10 5s2 5p3
|
|
4S3/2
|
S4S3/2
|
|
52
|
Te
|
tellurium
|
16
|
[Kr] 4d10 5s2 5p4
|
|
3P2
|
P3P2
|
|
53
|
I
|
iodine
|
17
|
[Kr] 4d10 5s2 5p5
|
|
2P3/2
|
P2P3/2
|
|
54
|
Xe
|
xenon
|
18
|
[Kr] 4d10 5s2 5p6
|
1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁶ 4d¹⁰ 5s² 5p⁶, [Kr] 5s² 4d¹⁰ 5p⁶
|
1S0
|
S1S0
|
|
55
|
Cs
|
caesium
|
1
|
[Xe] 6s1
|
[Xe] 6s¹
|
2S1/2
|
S2S1/2
|
|
56
|
Ba
|
barium
|
2
|
[Xe] 6s2
|
[Xe] 6s²
|
1S0
|
S1S0
|
|
57
|
La
|
lanthanum
|
f-block groups
|
[Xe] 5d1 6s2
|
|
2D3/2
|
D2D3/2
|
|
58
|
Ce
|
cerium
|
f-block groups
|
[Xe] 4f1 5d1 6s2[2]
|
|
1G4
|
G1G4
|
|
59
|
Pr
|
praseodymium
|
f-block groups
|
[Xe] 4f3 6s2
|
|
4I9/2
|
I4I9/2
|
|
60
|
Nd
|
neodymium
|
f-block groups
|
[Xe] 4f4 6s2
|
|
5I4
|
I5I4
|
|
61
|
Pm
|
promethium
|
f-block groups
|
[Xe] 4f5 6s2
|
|
6H5/2
|
H6H5/2
|
|
62
|
Sm
|
samarium
|
f-block groups
|
[Xe] 4f6 6s2
|
|
7F0
|
F7F0
|
|
63
|
Eu
|
europium
|
f-block groups
|
[Xe] 4f7 6s2
|
|
8S7/2
|
S8S7/2
|
|
64
|
Gd
|
gadolinium
|
f-block groups
|
[Xe] 4f7 5d1 6s2
|
|
9D2
|
D9D2
|
|
65
|
Tb
|
terbium
|
f-block groups
|
[Xe] 4f9 6s2
|
|
6H15/2
|
H6H15/2
|
|
66
|
Dy
|
dysprosium
|
f-block groups
|
[Xe] 4f10 6s2
|
|
5I8
|
I5I8
|
|
67
|
Ho
|
holmium
|
f-block groups
|
[Xe] 4f11 6s2
|
|
4I15/2
|
I4I15/2
|
|
68
|
Er
|
erbium
|
f-block groups
|
[Xe] 4f12 6s2
|
|
3H6
|
H3H6
|
|
69
|
Tm
|
thulium
|
f-block groups
|
[Xe] 4f13 6s2
|
|
2F7/2
|
F2F7/2
|
|
70
|
Yb
|
ytterbium
|
f-block groups
|
[Xe] 4f14 6s2
|
|
1S0
|
S1S0
|
|
71
|
Lu
|
lutetium
|
3
|
[Xe] 4f14 5d1 6s2
|
|
2D3/2
|
D2D3/2
|
|
72
|
Hf
|
hafnium
|
4
|
[Xe] 4f14 5d2 6s2
|
[Xe] 4f¹⁴ 5d² 6s²
|
3F2
|
F3F2
|
|
73
|
Ta
|
tantalum
|
5
|
[Xe] 4f14 5d3 6s2
|
[Xe] 4f¹⁴ 5d³ 6s²
|
4F3/2
|
F4F3/2
|
|
74
|
W
|
tungsten
|
6
|
[Xe] 4f14 5d4 6s2[3]
|
[Xe] 4f¹⁴ 5d⁴ 6s²
|
5D0
|
D5D0
|
|
75
|
Re
|
rhenium
|
7
|
[Xe] 4f14 5d5 6s2
|
[Xe] 4f¹⁴ 5d⁵ 6s²
|
6S5/2
|
S6S5/2
|
|
76
|
Os
|
osmium
|
8
|
[Xe] 4f14 5d6 6s2
|
[Xe] 4f¹⁴ 5d⁶ 6s²
|
5D4
|
D5D4
|
|
77
|
Ir
|
iridium
|
9
|
[Xe] 4f14 5d7 6s2
|
|
4F9/2
|
F4F9/2
|
|
78
|
Pt
|
platinum
|
10
|
[Xe] 4f14 5d9 6s1
|
|
3D3
|
D3D3
|
|
79
|
Au
|
gold
|
11
|
[Xe] 4f14 5d10 6s1
|
|
2S1/2
|
S2S1/2
|
|
80
|
Hg
|
mercury
|
12
|
[Xe] 4f14 5d10 6s2
|
[Xe] 4f¹⁴ 5d¹⁰ 6s²
|
1S0
|
S1S0
|
|
81
|
Tl
|
thallium
|
13
|
[Xe] 4f14 5d10 6s2 6p1
|
|
2P1/2
|
P2P1/2
|
|
82
|
Pb
|
lead
|
14
|
[Xe] 4f14 5d10 6s2 6p2
|
|
3P0
|
P3P0
|
|
83
|
Bi
|
bismuth
|
15
|
[Xe] 4f14 5d10 6s2 6p3
|
|
4S3/2
|
S4S3/2
|
|
84
|
Po
|
polonium
|
16
|
[Xe] 4f14 5d10 6s2 6p4
|
|
3P2
|
P3P2
|
|
85
|
At
|
astatine
|
17
|
[Xe] 4f14 5d10 6s2 6p5
|
|
2P3/2
|
P2P3/2
|
|
86
|
Rn
|
radon
|
18
|
[Xe] 4f14 5d10 6s2 6p6
|
1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁶ 4d¹⁰ 5s² 5p⁶ 4f¹⁴ 5d¹⁰ 6s² 6p⁶, [Xe] 4f¹⁴ 5d¹⁰ 6s² 6p⁶
|
1S0
|
S1S0
|
|
87
|
Fr
|
francium
|
1
|
[Rn] 7s1
|
[Rn] 7s¹
|
2S1/2
|
S2S1/2
|
|
88
|
Ra
|
radium
|
2
|
[Rn] 7s2
|
[Rn] 7s²
|
1S0
|
S1S0
|
|
89
|
Ac
|
actinium
|
f-block groups
|
[Rn] 6d1 7s2
|
|
2D3/2
|
D2D3/2
|
|
90
|
Th
|
thorium
|
f-block groups
|
[Rn] 6d2 7s2
|
|
3F2
|
F3F2
|
|
91
|
Pa
|
protactinium
|
f-block groups
|
[Rn] 5f2 6d1 7s2
|
|
4K11/2
|
K4K11/2
|
|
92
|
U
|
uranium
|
f-block groups
|
[Rn] 5f3 6d1 7s2
|
|
5L6
|
L5L6
|
|
93
|
Np
|
neptunium
|
f-block groups
|
[Rn] 5f4 6d1 7s2
|
|
6L11/2
|
L6L11/2
|
|
94
|
Pu
|
plutonium
|
f-block groups
|
[Rn] 5f6 7s2
|
|
7F0
|
F7F0
|
|
95
|
Am
|
americium
|
f-block groups
|
[Rn] 5f7 7s2
|
|
8S7/2
|
S8S7/2
|
|
96
|
Cm
|
curium
|
f-block groups
|
[Rn] 5f7 6d1 7s2
|
|
9D2
|
D9D2
|
|
97
|
Bk
|
berkelium
|
f-block groups
|
[Rn] 5f9 7s2
|
|
6H15/2
|
H6H15/2
|
|
98
|
Cf
|
californium
|
f-block groups
|
[Rn] 5f10 7s2
|
[Rn] 5f¹⁰ 7s²[5]
|
5I8
|
I5I8
|
|
99
|
Es
|
einsteinium
|
f-block groups
|
[Rn] 5f11 7s2
|
|
4I15/2
|
I4I15/2
|
|
100
|
Fm
|
fermium
|
f-block groups
|
[Rn] 5f12 7s2
|
|
3H6
|
H3H6
|
|
101
|
Md
|
mendelevium
|
f-block groups
|
[Rn] 5f13 7s2
|
|
2F7/2
|
F2F7/2
|
|
102
|
No
|
nobelium
|
f-block groups
|
[Rn] 5f14 7s2
|
|
1S0
|
S1S0
|
|
103
|
Lr
|
lawrencium
|
3
|
[Rn] 5f14 7s2 7p1
|
|
2P1/2?
|
P2P1/2?
|
|
104
|
Rf
|
rutherfordium
|
4
|
[Rn] 5f14 6d2 7s2[6][7]
|
[Rn] 5f¹⁴ 6d² 7s²
|
3F2
|
F3F2
|
|
105
|
Db
|
dubnium
|
5
|
[Rn] 5f14 6d3 7s2[7]
|
[Rn] 5f¹⁴ 6d³ 7s²
|
4F3/2?
|
F4F3/2?
|
|
106
|
Sg
|
seaborgium
|
6
|
[Rn] 5f14 6d4 7s2[7]
|
[Rn] 5f¹⁴ 6d⁴ 7s²
|
5D0?
|
D5D0?
|
|
107
|
Bh
|
bohrium
|
7
|
[Rn] 5f14 6d5 7s2[8][7]
|
[Rn] 5f¹⁴ 6d⁵ 7s²
|
6S5/2?
|
S6S5/2?
|
|
108
|
Hs
|
hassium
|
8
|
[Rn] 5f14 6d6 7s2
|
[Rn] 5f¹⁴ 6d⁶ 7s²
|
5D4?
|
D5D4?
|
|
109
|
Mt
|
meitnerium
|
9
|
[Rn] 5f14 6d7 7s2 (predicted)[7][10]
|
|
4F9/2?
|
F4F9/2?
|
|
110
|
Ds
|
darmstadtium
|
10
|
[Rn] 5f14 6d8 7s2 (predicted)[7]
|
|
3F4?
|
F3F4?
|
|
111
|
Rg
|
roentgenium
|
11
|
[Rn] 5f14 6d9 7s2 (predicted)[11][7]
|
|
2D5/2?
|
D2D5/2?
|
|
112
|
Cn
|
copernicium
|
12
|
[Rn] 5f14 6d10 7s2 (predicted)[7]
|
|
1S0?
|
S1S0?
|
|
113
|
Nh
|
nihonium
|
13
|
[Rn] 5f14 6d10 7s2 7p1 (predicted)[7]
|
|
2P1/2?
|
P2P1/2?
|
|
114
|
Fl
|
flerovium
|
14
|
[Rn] 5f14 6d10 7s2 7p2 (predicted)[7]
|
|
3P0?
|
P3P0?
|
|
115
|
Mc
|
moscovium
|
15
|
[Rn] 5f14 6d10 7s2 7p3 (predicted)[7]
|
|
4S3/2?
|
S4S3/2?
|
|
116
|
Lv
|
livermorium
|
16
|
[Rn] 5f14 6d10 7s2 7p4 (predicted)[7]
|
|
3P2?
|
P3P2?
|
|
117
|
Ts
|
tennessine
|
17
|
[Rn] 5f14 6d10 7s2 7p5 (predicted)[7]
|
|
2P3/2?
|
P2P3/2?
|
|
118
|
Og
|
oganesson
|
18
|
[Rn] 5f14 6d10 7s2 7p6 (predicted)[12][7]
|
1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁶ 4d¹⁰ 5s² 5p⁶ 4f¹⁴ 5d¹⁰ 6s² 6p⁶ 5f¹⁴ 6d¹⁰ 7s² 7p⁶, [Rn] 5f¹⁴ 6d¹⁰ 7s² 7p⁶
|
1S0?
|
S1S0?
|
|
119
|
Uue
|
ununennium
|
1
|
[Og] 8s1 (predicted)[7]
|
|
2S1/2?
|
S2S1/2?
|
|
120
|
Ubn
|
unbinilium
|
2
|
[Og] 8s2 (predicted)[7]
|
|
1S0?
|
S1S0?
|
|
121
|
Ubu
|
unbiunium
|
g-block groups
|
[Og] 8s2 8p1 (predicted)[7]
|
|
2P1/2?
|
P2P1/2?
|
|
122
|
Ubb
|
unbibium
|
g-block groups
|
[Og] 7d1 8s2 8p1 (predicted)[13]
|
|
|
|
|
123
|
Ubt
|
unbitrium
|
g-block groups
|
|
|
|
|
|
124
|
Ubq
|
unbiquadium
|
g-block groups
|
[Og] 6f3 8s2 8p1 (predicted)[13]
|
|
|
|
|
125
|
Ubp
|
unbipentium
|
g-block groups
|
|
|
|
|
|
126
|
Ubh
|
unbihexium
|
g-block groups
|
[Og] 5g2 6f3 8s2 8p1 (predicted)[13]
|
|
|
|
|