Electron Affinity Chart (Labeled Periodic table + List)

Electron affinity chart periodic table

Periodic table with electron affinity values is shown above. The values of electron affinity are given in kJ/mol. Values in parentheses (   ) are predicted values.

Electron affinity is the amount of energy change (ΔE) that occurs when an electron is added in the outermost shell of an isolated gaseous atom.

In other words, when the electron is added to a neutral atom, the energy is either released or absorbed. And this amount of energy change (ΔE) is called electron affinity.

This energy change (ΔE) can be positive, negative or zero.

And the sign of Electron Affinity (EEA) is opposite to the sign of energy change (ΔE).

EEA  =  – (ΔE)

In simple words, if ΔE is positive, then EEA will be negative. And if ΔE is negative, then EEA will be positive.

Points to remember:

  • For exothermic reaction (i.e when energy is released), the change in energy (ΔE) is negative. Hence the sign of Electron Affinity (EEA) will be positive.
  • For endothermic reaction (i.e when energy is absorbed), the change in energy (ΔE) is positive. Hence the sign of Electron Affinity (EEA) will be negative.
  • For neutral process (i.e when energy is neither absorbed nor released), the value of Electron Affinity (EEA) will be zero.

More the positive values of Electron Affinity (EEA), more is the energy released.

Halogens on the periodic table shows more positive values of Electron Affinity (EEA). Hence they indicate that more energy is released when an electron is added to the neutral atom.

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Electron Affinity Values of All Elements

Atomic numberElementsElectron affinity (kJ/mol)
1Electron affinity of Hydrogen (H)72.78
2Electron affinity of Helium (He)(-48)
3Electron affinity of Lithium (Li)59.63
4Electron affinity of Beryllium (Be)(-48)
5Electron affinity of Boron (B)26.99
6Electron affinity of Carbon (C)121.77
7Electron affinity of Nitrogen (N)-6.8
8Electron affinity of Oxygen (O)140.98
9Electron affinity of Fluorine (F)328.16
10Electron affinity of Neon (Ne)(-116)
11Electron affinity of Sodium (Na)52.87
12Electron affinity of Magnesium (Mg)(-40)
13Electron affinity of Aluminum (Al)41.76
14Electron affinity of Silicon (Si)134.06
15Electron affinity of Phosphorus (P)72.04
16Electron affinity of Sulfur (S)200.4
17Electron affinity of Chlorine (Cl)348.57
18Electron affinity of Argon (Ar)(-96)
19Electron affinity of Potassium (K)48.38
20Electron affinity of Calcium (Ca)2.37
21Electron affinity of Scandium (Sc)18
22Electron affinity of Titanium (Ti)7.28
23Electron affinity of Vanadium (V)50.91
24Electron affinity of Chromium (Cr)65.21
25Electron affinity of Manganese (Mn)(-50)
26Electron affinity of Iron (Fe)14.78
27Electron affinity of Cobalt (Co)63.89
28Electron affinity of Nickel (Ni)111.65
29Electron affinity of Copper (Cu)119.23
30Electron affinity of Zinc (Zn)(-58)
31Electron affinity of Gallium (Ga)29.06
32Electron affinity of Germanium (Ge)118.93
33Electron affinity of Arsenic (As)77.65
34Electron affinity of Selenium (Se)194.95
35Electron affinity of Bromine (Br)324.53
36Electron affinity of Krypton (Kr)(-96)
37Electron affinity of Rubidium (Rb)46.88
38Electron affinity of Strontium (Sr)5.02
39Electron affinity of Yttrium (Y)29.6
40Electron affinity of Zirconium (Zr)41.8
41Electron affinity of Niobium (Nb)88.51
42Electron affinity of Molybdenum (Mo)72.10
43Electron affinity of Technetium (Tc)(53)
44Electron affinity of Ruthenium (Ru)(100.27)
45Electron affinity of Rhodium (Rh)110.27
46Electron affinity of Palladium (Pd)54.24
47Electron affinity of Silver (Ag)125.86
48Electron affinity of Cadmium (Cd)(-68)
49Electron affinity of Indium (In)37.04
50Electron affinity of Tin (Sn)107.29
51Electron affinity of Antimony (Sb)101.05
52Electron affinity of Tellurium (Te)190.16
53Electron affinity of Iodine (I)295.15
54Electron affinity of Xenon (Xe)(-77)
55Electron affinity of Caesium (Cs)45.5
56Electron affinity of Barium (Ba)13.95
57Electron affinity of Lanthanum53.79
58Electron affinity of Cerium (Ce)55
59Electron affinity of Praseodymium (Pr)10.53
60Electron affinity of Neodymium (Nd)9.4
61Electron affinity of Promethium (Pm)(12.45)
62Electron affinity of Samarium (Sm)(15.63)
63Electron affinity of Europium (Eu)11.2
64Electron affinity of Gadolinium (Gd)(13.22)
65Electron affinity of Terbium (Tb)12.67
66Electron affinity of Dysprosium (Dy)(33.96)
67Electron affinity of Holmium (Ho)(32.61)
68Electron affinity of Erbium (Er)(30.1)
69Electron affinity of Thulium (Tm)99
70Electron affinity of Ytterbium (Yb)(-1.93)
71Electron affinity of Lutetium (Lu)23.04
72Electron affinity of Hafnium (Hf)17.18
73Electron affinity of Tantalum (Ta)31
74Electron affinity of Tungsten (W)78.76
75Electron affinity of Rhenium (Re)5.82
76Electron affinity of Osmium (Os)104
77Electron affinity of Iridium (Ir)150.94
78Electron affinity of Platinum (Pt)205.04
79Electron affinity of Gold (Au)222.75
80Electron affinity of Mercury (Hg)(-48)
81Electron affinity of Thallium (Tl)30.88
82Electron affinity of Lead (Pb)34.41
83Electron affinity of Bismuth (Bi)90.92
84Electron affinity of Polonium (Po)(136)
85Electron affinity of Astatine (At)233
86Electron affinity of Radon (Rn)(-68)
87Electron affinity of Francium (Fr)(46.89)
88Electron affinity of Radium (Ra)(9.64)
89Electron affinity of Actinium (Ac)(33.77)
90Electron affinity of Thorium (Th)(112.72)
91Electron affinity of Protactinium (Pa)(53.03)
92Electron affinity of Uranium (U)(50.94)
93Electron affinity of Neptunium (Np)(45.85)
94Electron affinity of Plutonium (Pu)(-48.33)
95Electron affinity of Americium (Am)(9.93)
96Electron affinity of Curium (Cm)(27.17)
97Electron affinity of Berkelium (Bk)(-165.24)
98Electron affinity of Californium (Cf)(-97.31)
99Electron affinity of Einsteinium (Es)(-28.6)
100Electron affinity of Fermium (Fm)(33.96)
101Electron affinity of Mendelevium (Md)(93.91)
102Electron affinity of Nobelium (No)(-223.22)
103Electron affinity of Lawrencium (Lr)(-30.04)
104Electron affinity of Rutherfordium (Rf)unknown
105Electron affinity of Dubnium (Db)unknown
106Electron affinity of Seaborgium (Sg)unknown
107Electron affinity of Bohrium (Bh)unknown
108Electron affinity of Hassium (Hs)unknown
109Electron affinity of Meitnerium (Mt)unknown
110Electron affinity of Darmstadtium (Ds)unknown
111Electron affinity of Roentgenium (Rg)(151)
112Electron affinity of Copernicium (Cn)unknown
113Electron affinity of Nihonium (Nh)(66.6)
114Electron affinity of Flerovium (Fl)unknown
115Electron affinity of Moscovium (Mc)(35.3)
116Electron affinity of Livermorium (Lv)(74.9)
117Electron affinity of Tennessine (Ts)(165.9)
118Electron affinity of Oganesson (Og)(5.403)

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External links:
Electron affinity of elements: Wikipedia

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