yttrium

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Symbol:

Y

Atomic Number:

39

Relative Atomic Mass:

88.90585 g mol^-1

Natural Abundance in Lithosphere, hydrosphere and atmosphere:

3 x 10^-3% (mass fraction)

Electron Configuration:

[Kr]4d5s²

Oxidation States:

III

Atomic Radius:

177.6pm

Covalent Radius:

162pm

Ionic Radius:

90pm (for +3 oxidation state)

Melting Point:

1523°C

Density:

4.47 g cm^-3 (at 20°C)

First Ionisation Energy:

6.38 eV

Reduction Potential:

-2.372V

for Y³⁺ + 3e^- a Y_(s)

Electronegativity (Allred and Rochow):

1.1

Number of Natural Isotopes:

1

Mass Number of the Most Abundant Isotopes:

89 g mol^-1 a 100% abundance