Ionic Radius Periodic Table of the Elements

Ionic Radius Periodic Table of the Elements
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Periodic Table with Ionic Radius

 

Ion size plays an important role in determining the structure and stability of ionic solids, the properties of ions in aqueous solution, and the biological effects of ions. As with atoms, it is impossible to define precisely the sizes of ions. Ionic radii are determined from the measured distances between ion centers in ionic compounds. A table of ionic radii is given below.

 

Table 1: Periodic Table with Ionic Radii (Å) of the elements
1 2 3 4 5 6 7

H

1.46

 

          

Li

0.68

Be

0.31

      

 

 

Na

0.98

Mg

0.66

          

K

1.33

Ca

0.99

Sc

0.81

Ti

0.68

 

 

 

 

V

0.59 (+5)

0.63 (+4)

0.74 (+3)

0.88 (+2)

 

 

Cr

0.63 (+3)

0.89 (+2)

Mn

0.80 (+2)

Rb

1.48

Sr

1.13

Y

0.93

Zr

0.80

 

Nb

0.69 (+5)

0.74 (+4)

 

Mo

0.62 (+6)

0.70 (+4)

Tc

 

Cs

1.67

Ba

1.35

La

0.85 (+3)

Hf

0.78

Ta

0.68 (+5)

 

W

0.62 (+6)

0.70 (+4)

 

Re

0.56 (+7)

0.27 (+4)

Fr

˜1.8

Ra

1.43

Ac

 

Th

 

Pa

 

U

 

Np

 

 

Table 1 (continued...)
  8 9 10 11 12
 

 

Fe

0.60 (+3)

0.72 (+2)

 

Co

0.63 (+3)

0.72 (+2)

Ni

0.69 (+2)

 

Cu

0.72 (+2)

0.96 (+1)

Zn

0.74 (+2)
 

Ru

0.68 (+3)

Rh

0.68 (+3)

 

Pd

0.65 (+4)

0.80 (+2)

 

Ag

0.89 (+2)

1.26 (+1)

 

Cd

0.97 (+2)

1.14 (+1)
 

 

Os

0.69 (+6)

0.88 (+4)

Ir

0.68 (+4)

 

Pt

0.65 (+4)

0.80 (+2)

 

Au

0.85 (+2)

1.37 (+1)

 

Hg

1.10 (+2)

1.27 (+1)

 

Table 1 (continued...)
13 14 15 16 17 17

B

0.23 (+3)

 

C

0.15 (+4)

2.60 (-4)

N

1.71 (-3)

O

1.40 (-2)

F

1.33

He

 

Al

0.51 (+3)

 

Si

0.42 (+4)

2.71 (-4)

 

P

0.44 (+3)

2.12(-3)

 

S

0.29 (+6)

1.84 (-2)

Cl

1.81

Ne

 

Ga

0.62 (+3)

 

Ge

0.53 (+4)

0.73 (+2)

 

 

As

0.46 (+5)

0.58 (+3)

2.22 (-3)

 

Se

0.42 (+6)

1.98 (-2)

Br

1.96

Ar

 

In

0.81 (+3)

 

Sn

0.71(+4)

0.93 (+2)

 

 

Sb

0.62 (+5)

0.76 (+3)

2.45 (-3)

 

Te

0.56 (+6)

2.21 (-2)

I

2.20

Kr

 

Tl

0.95 (+3)

 

Pb

0.84 (+4)

1.20 (+2)

Bi

0.96 (+3)

Po

0.67 (+6)

At

˜2.27

Xe

 

 

References

  1. CRC Handbook of Chemistry and Physics, 52nd edition, The Chemical Rubber Co., (1971)
  2. David W. Oxtoby, H.P. Gillis, Alan Campion, “Principles of Modern Chemistry”, Sixth Edition, Thomson Brooks/Cole, 2008
  3. Steven S. Zumdahl, “Chemical Principles”  6th Edition, Houghton Mifflin Company, 2009

Key Terms

ionic radius, , ionic size, ionic radius table,

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