Cadmium

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Symbol:

Cd

Atomic Number:

48

Relative Atomic Mass:

112.411 g mol^-1

Natural Abundance in Lithosphere, hydrosphere and atmosphere:

3 x 10^-5% (mass fraction)

Electron Configuration:

[Kr]4d¹⁰5s²

Oxidation States:

II

Atomic Radius:

148.9pm

Covalent Radius:

141pm

Ionic Radius:

78pm (for +2 oxidation state, 4 coordinate)

95pm (for +2 oxidation state, 6 coordinate)

Melting Point:

320.9°C

Density:

8.64 g cm^-3 (at 20°C)

First Ionisation Energy:

8.993 eV

Reduction Potential:

-0.403V

for Cd²⁺ + 2e^- a Cd_(s)

Electronegativity (Allred and Rochow):

1.5

Number of Natural Isotopes:

8

Mass Number of the Most Abundant Isotopes:

111 g mol^-1 a 12.8% abundance

112 g mol^-1 a 24.1% abundance

114 g mol^-1 a 28.7% abundance