gold

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Symbol:

Au

Atomic Number:

79

Relative Atomic Mass:

196.96654 g mol^-1

Natural Abundance in Lithosphere, hydrosphere and atmosphere:

5 x 10^-7% (mass fraction)

Electron Configuration:

[Xe]4f¹⁴5d¹⁰6s

Oxidation States:

III, I

Atomic Radius:

144.2pm

Covalent Radius:

134pm

Ionic Radius:

68pm (for +3 oxidation state)

58pm (for +1 oxidation state)

Melting Point:

1064.4°C

Density:

19.32 g cm^-3 (at 20°C)

First Ionisation Energy:

9.225 eV

Reduction Potential:

1.498V

for Au³⁺ +3e^- a Au_(s)

Electronegativity (Allred and Rochow):

1.4

Number of Natural Isotopes:

1

Mass Number of the Most Abundant Isotopes:

197 g mol^-1 a 100% abundance