vanadium

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Symbol:

V

Atomic Number:

23

Relative Atomic Mass:

50.9415 g mol^-1

Natural Abundance in Lithosphere, hydrosphere and atmosphere:

0.01% (mass fraction)

Electron Configuration:

[Ar]3d³4s²

Oxidation States:

V, IV, III, II, 0

Atomic Radius:

131.1pm

Covalent Radius:

122pm

Ionic Radius:

54pm (for +5 oxidation state)

79pm (for +2 oxidation state)

Melting Point:

1890°C

Density:

6.09 g cm^-3 (at 20°C)

First Ionisation Energy:

6.74 eV

Reduction Potential:

-1.175V

for V²⁺ + 2e^- a V_(s)

Electronegativity (Allred and Rochow):

1.5

Number of Natural Isotopes:

2

Mass Number of the Most Abundant Isotopes:

50 g mol^-1 a 0.2% abundance

51 g mol^-1 a 99.8% abundance