indium

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Symbol:

In

Atomic Number:

49

Relative Atomic Mass:

114.818 g mol^-1

Natural Abundance in Lithosphere, hydrosphere and atmosphere:

10^-5% (mass fraction)

Electron Configuration:

[Kr]4d¹⁰5s²5p

Oxidation States:

III

Atomic Radius:

162.6pm

Covalent Radius:

150pm

Ionic Radius:

62pm (for +3 oxidation state, 4 coordinate)

80pm (for +3 oxidation state, 6 coordinate)

Melting Point:

156.6°C

Density:

7.31 g cm^-3 (at 20°C)

First Ionisation Energy:

5.786 eV

Reduction Potential:

-0.338V

for In³⁺ +3e^- a In_(s)

Electronegativity (Allred and Rochow):

1.5

Number of Natural Isotopes:

2

Mass Number of the Most Abundant Isotopes:

113 g mol^-1 a 4.3% abundance

115 g mol^-1 a 95.7% abundance