1A
1
1s
1
hydrogen
1.008
3
Periodic Table of the Elements
2A
4
Li
Be
lithium
beryllium
[He]2s1
8A
2
Los Alamos National Laboratory Chemistry Division
3A
5
B
4A
6
C
5A
7
6A
8
1s2
7A
9
helium
4.003
10
[He]2s2
[He]2s22p1
[He]2s22p2
[He]2s22p3
[He]2s22p4
[He]2s22p5
[He]2s22p6
9.012
10.81
12.01
14.01
16.00
19.00
20.18
11
12
13
17
18
[Ne]3s1
[Ne]3s2
6.941
boron
sodium
22.99
19
magnesium
24.31
20
3B
21
Sc
K
Ca
potassium
calcium
scandium
37
38
39
[Kr]5s2
[Kr]5s24d1
87.62
88.91
[Ar]4s1
39.10
[Ar]4s2
40.08
Rb
Sr
rubidium
strontium
55
56
[Kr]5s1
85.47
Cs
[Xe]6s1
cesium
132.9
87
Ba
Y
yttrium
*
[Ar]4s23d2
V
[Ar]4s23d3
6B
24
7B
25
Cr
Mn
[Ar]4s13d5
[Ne]3s23p1
[Ne]3s23p2
[Ne]3s23p3
[Ne]3s23p4
[Ne]3s23p5
[Ne]3s23p6
26.98
28.09
30.97
32.07
35.45
39.95
34
35
36
[Ar]4s23d104p3
[Ar]4s23d104p4
[Ar]4s23d104p5
[Ar]4s23d104p6
72.64
74.92
78.96
50
51
58.69
63.55
65.39
69.72
43
44
45
46
47
48
49
91.22
72
Hf
iron
cobalt
Tc
Ru
Rh
Pd
niobium
molybdenum
technetium
ruthenium
rhodium
palladium
73
74
75
76
77
[Kr]5s14d4
92.91
Ta
[Kr]5s14d5
95.94
W
[Ar]4s23d104p1
58.93
42
Nb Mo
[Ar]4s23d10
55.85
41
Zr
copper
31
Ga
54.94
40
[Kr]5s24d2
nickel
Zn
[Ar]4s23d8
manganese
zirconium
Cu
aluminum
[Ar]4s23d7
chromium
52.00
28
Ni
12B
30
[Ar]4s23d6
vanadium
50.94
Co
11B
29
[Ar]4s23d5
titanium
47.88
26
Fe
8B
27
[Kr]5s24d5
(98)
Re
[Kr]5s14d7
101.1
Os
[Kr]5s14d8
102.9
Ir
[Kr]4d10
[Ar]4s13d10
Ag
zinc
Cd
gallium
In
silicon
32
Ge
[Ar]4s23d104p2
germanium
Sn
[Kr]5s14d10
[Kr]5s24d10
[Kr]5s24d105p1
106.4
107.9
112.4
114.8
118.7
78
79
80
81
82
Pt
silver
Au
cadmium
neon
15
Si
indium
Tl
[Kr]5s24d105p2
tin
Pb
P
phosphorus
33
As
arsenic
16
fluorine
S
sulfur
Se
selenium
chlorine
bromine
79.90
argon
krypton
83.
52
53
54
[Kr]5s24d105p3
[Kr]5s24d105p4
[Kr]5s24d105p5
[Kr]5s24d105p6
121.8
127.6
126.9
131.3
84
85
86
Sb
antimony
83
Bi
Te
tellurium
Po
I
iodine
At
xenon
[Xe]6s24f145d2
[Xe]6s24f145d3
[Xe]6s24f145d4
[Xe]6s24f145d5
[Xe]6s24f145d6
[Xe]6s24f145d7
[Xe]6s14f145d9
[Xe]6s14f145d10
[Xe]6s24f145d10
[Xe]6s24f145d106p1
[Xe]6s24f145d106p2
[Xe]6s24f145d106p3
[Xe]6s24f145d106p4
[Xe]6s24f145d106p5
[Xe]6s24f145d106p6
137.3
178.5
180.9
183.9
186.2
190.2
192.2
195.1
197.0
200.5
204.4
207.2
209.0
(209)
(210)
(222)
112
113
114
115
116
117
118
copernicium
(277)
(?)
(285)
(?)
(289)
(?)
(?)
barium
88
Ra
francium
radium
(226)
[Rn]7s1
44.96
Ti
5B
23
oxygen
[Xe]6s2
Fr
(223)
[Ar]4s23d1
4B
22
nitrogen
14
Al
Na Mg
carbon
hafnium
**
[Rn]7s25f146d2
[Rn]7s2
Lanthanide Series*
rutherfordium
(261)
57
La
Xe]6s25d1
58
Ce
[Xe]6s24f15d1
105
106
[Rn]7s25f146d3
[Rn]7s25f146d4
Db
dubnium
(262)
59
Pr
[Xe]6s24f3
Sg
seaborgium
(266)
60
rhenium
107
Bh
[Rn]7s25f146d5
bohrium
(264)
61
osmium
108
Hs
[Rn]7s25f146d6
hassium
(277)
62
iridium
109
Mt
[Rn]7s25f146d7
meitnerium
(268)
63
Nd Pm Sm Eu
[Xe]6s24f4
[Xe]6s24f5
[Xe]6s24f6
platinum
110
darmstadtium
(271)
roentgenium
(272)
[Rn]7s15f146d9
64
terbium
dysprosium
holmium
[Xe]6s24f75d1
152.0
157.2
140.1
89
90
91
92
93
94
95
96
[Rn]7s25f7
[Rn]7s25f76d1
actinium
(227)
thorium
[Rn]7s26d1
[Rn]7s26d2
232
Pa
U
[Rn]7s25f26d1
[Rn]7s25f36d1
231
238
protactinium
uranium
Np
[Rn]7s25f46d1
neptunium
(237)
Pu Am Cm
[Rn]7s25f6
plutonium
(244)
americium
(243)
67
gadolinium
[Xe]6s24f7
138.9
Th
66
Ho
europium
curium
(247)
[Xe]6s24f9
158.9
97
Bk
[Rn]7s25f9
berkelium
(247)
lead
bismuth
polonium
astatine
radon
Cn Uut Uuq Uup Uuh Uus Uuo
Dy
samarium
Ac
thallium
Tb
promethium
(145)
150.4
65
mercury
Gd
neodymium
144.2
111
Rg
praseodymium
140.9
gold
Ds
cerium
lanthanum
Actinide Series**
104
Rf
tantalum
tungsten
[Xe]6s24f10
162.5
98
Cf
[Rn]7s25f10
californium
(251)
68
Tm
erbium
thulium
[Xe]6s24f11
[Xe]6s24f12
164.9
167.3
99
Es
[Rn]7s25f11
einsteinium
(252)
69
Er
100
[Xe]6s24f13
168.9
70
Yb
[Xe]6s24f14
[Xe]6s24f145d1
173.0
175.0
ytterbium
101
102
[Rn]7s25f13
[Rn]7s25f14
Fm Md No
[Rn]7s25f12
fermium
(257)
mendelevium
(258)
71
Lu
nobelium
(259)
lutetium
103
Lr
[Rn]7s25f146d1
lawrencium
(262)