Los Alamos National Laboratory
Periodic Table of Elements: LANL

Periodic Table of Elements

A Resource for Elementary, Middle School, and High School Students

Group 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
Period
1 1
H
1.008
2
He
4.003
2 3
Li
6.94
4
Be
9.012
5
B
10.81
6
C
12.01
7
N
14.01
8
O
16.00
9
F
19.00
10
Ne
20.18
3 11
Na
22.99
12
Mg
24.31
13
Al
26.98
14
Si
28.09
15
P
30.97
16
S
32.06
17
Cl
35.45
18
Ar
39.95
4 19
K
39.10
20
Ca
40.08
21
Sc
44.96
22
Ti
47.88
23
V
50.94
24
Cr
52.00
25
Mn
54.94
26
Fe
55.85
27
Co
58.93
28
Ni
58.69
29
Cu
63.55
30
Zn
65.39
31
Ga
69.72
32
Ge
72.64
33
As
74.92
34
Se
78.96
35
Br
79.90
36
Kr
83.79
5 37
Rb
85.47
38
Sr
87.62
39
Y
88.92
40
Zr
91.22
41
Nb
92.91
42
Mo
95.96
43
Tc
(98)
44
Ru
101.1
45
Rh
102.9
46
Pd
106.4
47
Ag
107.9
48
Cd
112.4
49
In
114.8
50
Sn
118.7
51
Sb
121.8
52
Te
127.6
53
I
126.9
54
Xe
131.3
6 55
Cs
132.9
56
Ba
137.3
* 72
Hf
178.5
73
Ta
180.9
74
W
183.9
75
Re
186.2
76
Os
190.2
77
Ir
192.2
78
Pt
195.1
79
Au
197.0
80
Hg
200.5
81
TI
204.38
82
Pb
207.2
83
Bi
209.0
84
Po
(209)
85
At
(210)
86
Rn
(222)
7 87
Fr
(223)
88
Ra
(226)
** 104
Rf
(265)
105
Db
(268)
106
Sg
(271)
107
Bh
(270)
108
Hs
(277)
109
Mt
(276)
110
Ds
(281)
111
Rg
(280)
112
Cn
(285)
113
Uut
(284)
114
Fl
(289)
115
Uup
(288)
116
Lv
(293)
117
Uus
(294)
118
Uuo
(294)

Lanthanide Series* 57
La
138.9
58
Ce
140.1
59
Pr
140.9
60
Nd
144.2
61
Pm
(145)
62
Sm
150.4
63
Eu
152.0
64
Gd
157.2
65
Tb
158.9
66
Dy
162.5
67
Ho
164.9
68
Er
167.3
69
Tm
168.9
70
Yb
173.0
71
Lu
175.0
Actinide Series** 89
Ac
(227)
90
Th
232
91
Pa
231
92
U
238
93
Np
(237)
94
Pu
(244)
95
Am
(243)
96
Cm
(247)
97
Bk
(247)
98
Cf
(251)
99
Es
(252)
100
Fm
(257)
101
Md
(258)
102
No
(259)
103
Lr
(262)

Alkali metals Lanthanides
Alkaline earth metals Actinides
Transition metals Nonmetals
Post-transition metals Halogens
Metalloid Noble gases

Contact chemistry@lanl.gov with comments about this table.

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