84Po209

Polonium

Post-transition metalsBlock pPeriod 6Group 16solid at 20 °C
Configuration :[Xe] 4f¹⁴ 5d¹⁰ 6s² 6p⁴
Atomic mass :209 u
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Modèle de Bohr · pédagogique

Electron configuration

Full[Xe] 4f¹⁴ 5d¹⁰ 6s² 6p⁴
Short[Xe] 4f¹⁴ 5d¹⁰ 6s² 6p⁴
Valence electrons6
KLMNOPQ shells
K2
L8
M18
N32
O18
P6

Electronegativity

Pauling2
Allen
Mulliken (eV)

Atomic radii

Empirical190 pm
Calculated135 pm
Covalent140 pm
Van der Waals197 pm

Successive ionisation energies

I₁812.1 kJ/mol
Electron affinity

Oxidation states

-2+2+4+5+6
Bold states = most common.
Period 6Block pIUPAC Group 16Family Post-transition metals
Sources : NIST Atomic Weights & Isotopic Compositions, IUPAC Recommendations, CODATA. Methodology