neodymium

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Symbol:

Nd

Atomic Number:

60

Relative Atomic Mass:

144.24 g mol^-1

Natural Abundance in Lithosphere, hydrosphere and atmosphere:

2 x 10^-3% (mass fraction)

Electron Configuration:

[Xe]4f⁴6s²

Oxidation States:

III

Atomic Radius:

181.4pm

Covalent Radius:

164pm

Ionic Radius:

98pm (for +3 oxidation state, 6 coordinate)

116pm (for +3 oxidation state, 9 coordinate)

Melting Point:

1010°C

Density:

7.00 g cm^-3 (at 20°C)

First Ionisation Energy:

5.49 eV

Reduction Potential:

-2.431V

for Nd³⁺ + 3e^- a Nd_(s)

Electronegativity (Allred and Rochow):

1.1

Number of Natural Isotopes:

7

Mass Number of the Most Abundant Isotopes:

142 g mol^-1 a 27.1% abundance

144 g mol^-1 a 23.8% abundance

146 g mol^-1 a 17.2% abundance