Periodic table of the elements

Click on the element for tables of the Effective Ionic Radii

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
H
1
1.008
He
2
4.003
Li
3
6.941
Be
4
9.012
B
5
10.81
C
6
12.01
N
7
14.01
O
8
16.00
F
9
19.00
Ne
10
20.18
Na
11
22.99
Mg
12
24.30
Al
13
26.98
Si
14
28.09
P
15
30.97
S
16
32.07
Cl
17
35.45
Ar
18
39.95
K
19
39.10
Ca
20
40.08
Sc
21
44.96
Ti
22
47.88
V
23
50.94
Cr
24
52.00
Mn
25
54.94
Fe
26
55.85
Co
27
58.93
Ni
28
58.69
Cu
29
63.55
Zn
30
65.39
Ga
31
69.72
Ge
32
72.61
As
33
74.92
Se
34
78.96
Br
35
79.90
Kr
36
83.80
Rb
37
85.47
Sr
38
87.62
Y
39
88.91
Zr
40
91.22
Nb
41
92.91
Mo
42
95.94
Tc
43
98.91
Ru
44
101.1
Rh
45
102.9
Pd
46
106.4
Ag
47
107.9
Cd
48
112.4
In
49
114.8
Sn
50
118.7
Sb
51
121.8
Te
52
127.6
I
53
126.9
Xe
54
131.3
Cs
55
132.9
Ba
56
137.3
La
57
138.9
Hf
72
178.5
Ta
73
180.9
W
74
183.8
Re
75
186.2
Os
76
190.2
Ir
77
192.2
Pt
78
195.1
Au
79
197.0
Hg
80
200.6
Tl
81
204.4
Pb
82
207.2
Bi
83
209.0
Po
84
210.0
At
85
210.0
Rn
86
222.0
Fr
87
223.0
Ra
88
226.0
Ac
89
227.0
Ce
58
140.1
Pr
59
140.9
Nd
60
144.2
Pm
61
144.9
Sm
62
150.4
Eu
63
152.0
Gd
64
157.2
Tb
65
158.9
Dy
66
162.5
Ho
67
164.9
Er
68
167.3
Tm
69
168.9
Yb
70
173.0
Lu
71
175.0
Th
90
232.0
Pa
91
231.0
U
92
238.0
Np
93
237.0
Pu
94
239.1
Am
95
243.1
Cm
96
247.1
Bk
97
247.1
Cf
98
252.1
Es
99
252.1
Fm
100
257.1
Md
101
256.1
No
102
259.1
Lr
103
260.1

Created by R. Seshadri & R. Basu, June 1999; updated October 2002

References

No responsibility is taken by the creaters of these tables for the data, for errors therein, and for problems/damages arising from their use.

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