Electron Affinities Periodic Table of the Elements | Chemistry Net

Electron Affinities Periodic Table of the Elements

Electron affinities Periodic Table of the Elements

Periodic Table with Electron Affinities

 

The electron affinity of an atom is the energy released when an electron is added to it. It is related to the atom's ionization energy and electronegativity. The basic difference between ionization energy and electron affinity is that ionization energy measures the ease with which an atom loses an electron, while electron affinity measures the ease with which an atom gains an electron.

 

Table 1: Periodic Table with Electron Affinities (kJ/mol) of gaseous atoms of the elements
1 2 3 4 5 6 7 8 9 10 11 12

H

72.77

 

                   

Li

59.63

Be

< 0

     

 

 

     

 

 

Na

52.87

Mg

< 0

                   

K

48.38

Ca

2.0

Sc

18.1

Ti

7.6

V

50.7

Cr

64.3

Mn

< 0

Fe

15.7

Co

63.8

Ni

111.5

Cu

118.5

Zn

< 0

Rb

46.88

Sr

4.6

Y

29.6

Zr

41.1

Nb

86.2

Mo

72.0

Tc

˜53

Ru

˜100

Rh

110

Pd

51.8

Ag

125.6

Cd

< 0

Cs

45.50

Ba

13.95

La

˜50

Hf

˜0

Ta

31.1

W

78.6

Re

˜14

Os

˜106

Ir

151

Pt

205.1

Au

222.7

Hg

< 0

Fr

44.00

Ra

> 0

Ac

1.1

Th

1.3

Pa

 

U

 

Np

 

         

 

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

B

26.7

C

121.85

N

-7

O

140.98

F

328.0

Al

42.6

Si

133.6

P

72.03

S

200.41

Cl

349.0

Ga

29

Ge

˜120

As

˜80

Se

194.97

Br

324.7

In

29

Sn

˜120

Sb

103

Te

190.15

I

295.2

Tl

˜20

Pb

35.1

Bi

91.3

Po

˜180

At

˜270

         

 



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

electron affinities, electronegativity difference, electron affinity, ionization energy,


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