molybdenum

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Symbol:

Mo

Atomic Number:

42

Relative Atomic Mass:

95.94 g mol^-1

Natural Abundance in Lithosphere, hydrosphere and atmosphere:

10^-3% (mass fraction)

Electron Configuration:

[Kr]4d⁵5s

Oxidation States:

VI, V, IV, III, II, 0

Atomic Radius:

136.3pm

Covalent Radius:

130pm

Ionic Radius:

59pm (for +6 oxidation state)

61pm (for +5 oxidation state)

Melting Point:

2617°C

Density:

10.28 g cm^-3 (at 20°C)

First Ionisation Energy:

7.099 eV

Reduction Potential:

-0.200V

for Mo³⁺ + 3e^- a Mo_(s)

Electronegativity (Allred and Rochow):

1.3

Number of Natural Isotopes:

7

Mass Number of the Most Abundant Isotopes:

95 g mol^-1 a 15.9% abundance

96 g mol^-1 a 16.7% abundance

98 g mol^-1 a 24.1% abundance