lead

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Symbol:

Pb

Atomic Number:

82

Relative Atomic Mass:

207.2 g mol^-1

Natural Abundance in Lithosphere, hydrosphere and atmosphere:

2 x 10^-3% (mass fraction)

Electron Configuration:

[Xe]4f¹⁴5d¹⁰6s²6p²

Oxidation States:

IV, II

Atomic Radius:

175pm

Covalent Radius:

154pm

Ionic Radius:

78pm (for +4 oxidation state)

119pm (for +2 oxidation state)

Melting Point:

327.5°C

Density:

11.34 g cm^-3 (at 20°C)

First Ionisation Energy:

7.416 eV

Reduction Potential:

-0.1262V

for Pb²⁺ + 2e^- a Pb_(s)

Electronegativity (Allred and Rochow):

1.6

Number of Natural Isotopes:

4

Mass Number of the Most Abundant Isotopes:

206 g mol^-1 a 24.1% abundance

207 g mol^-1 a 22.1% abundance

208 g mol^-1 a 52.4% abundance