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The Periodic Table of the Elements

1
H
1.01
2
He
4.00
3
Li
6.94
4
Be
9.01
5
B
10.81
6
C
12.01
7
N
14.01
8
O
16.00
9
F
19.00
10
Ne
20.18
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
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
72.59
33
As
74.92
34
Se
78.96
35
Br
79.90
36
Kr
83.80
37
Rb
85.47
38
Sr
87.62
39
Y
88.91
40
Zr
91.22
41
Nb
92.91
42
Mo
95.94
43
Tc
(98)
44
Ru
101.07
45
Rh
102.91
46
Pd
106.42
47
Ag
107.87
48
Cd
112.41
49
In
114.82
50
Sn
118.71
51
Sb
121.75
52
Te
127.60
53
I
126.91
54
Xe
131.29
55
Cs
132.91
56
Ba
137.33
57
La
138.91
72
Hf
178.49
73
Ta
180.95
74
W
183.85
75
Re
186.21
76
Os
190.2
77
Ir
192.22
78
Pt
195.08
79
Au
196.97
80
Hg
200.59
81
Tl
204.38
82
Pb
207.2
83
Bi
208.98
84
Po
(209)
85
At
(210)
86
Rn
(222)
87
Fr
(223)
88
Ra
226.03
89
Ac
227.03
104
Rf
(261)
105
Ha
(262)
106
Sg
(263)
107
Ns
(262)
108
Hs
(266)
109
Mt
(266)
110
Uun
(269)
111
Uuu
(272)
112
Uub
(277)
58
Ce
140.12
59
Pr
140.91
60
Nd
144.24
61
Pm
(145)
62
Sm
150.36
63
Eu
151.96
64
Gd
157.25
65
Tb
158.93
66
Dy
162.50
67
Ho
164.93
68
Er
167.26
69
Tm
168.93
70
Yb
173.04
71
Lu
174.97
90
Th
232.03
91
Pa
231.04
92
U
238.03
93
Np
237.05
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
(260)


hits since 24 Jul 1997 / RXN Communications / Table Code / webmaster@rxn.com / Revised 5 Nov 2012