tin

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Symbol:

Sn

Atomic Number:

50

Relative Atomic Mass:

118.710 g mol^-1

Natural Abundance in Lithosphere, hydrosphere and atmosphere:

3 x 10^-3% (mass fraction)

Electron Configuration:

[Kr]4d¹⁰5s²5p²

Oxidation States:

IV, II

Atomic Radius:

140.5pm

Covalent Radius:

140pm

Ionic Radius:

55pm (for +4 oxidation state, 4 coordinate)

69pm (for +4 oxidation state, 6 coordinate)

Melting Point:

232°C

Density:

7.29 g cm^-3 (at 20°C)

First Ionisation Energy:

7.344 eV

Reduction Potential:

-0.138V

for Sn²⁺ + 2e^- a Sn_(s)

Electronegativity (Allred and Rochow):

1.7

Number of Natural Isotopes:

10

Mass Number of the Most Abundant Isotopes:

116 g mol^-1 a 14.5% abundance

118 g mol^-1 a 24.2% abundance

120 g mol^-1 a 32.6% abundance