sulphur

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Symbol:

S

Atomic Number:

16

Relative Atomic Mass:

32.066 g mol^-1

Natural Abundance in Lithosphere, hydrosphere and atmosphere:

0.05% (mass fraction)

Electron Configuration:

[Ne]3s²3p⁴

Oxidation States:

VI, IV, II, -II

Atomic Radius:

103.5pm

Covalent Radius:

104pm

Ionic Radius:

184pm (for -2 oxidation state)

Van der Waals Radius:

180pm

Melting Point:

119.6°C

Density:

2.07 g cm^-3 (at 20°C)

First Ionisation Energy:

10.360 eV

Reduction Potential:

-0.48V

for S + 2e^- a S^2-

Electronegativity (Allred and Rochow):

2.4

Number of Natural Isotopes:

4

Mass Number of the Most Abundant Isotopes:

32 g mol^-1 a 95.0% abundance

33 g mol^-1 a 0.8% abundance

34 g mol^-1 a 4.2% abundance