Polonium

Document v1 · published by Koskamo · updated 2026-10-04

Polonium (Po) is chemical element 84, a metalloid in group 16, period 6 (PubChem).

Atomic number: 84
Symbol: Po
Group: 16
Period: 6
Atomic mass: 208.98243 u
Electron configuration: [Xe]6s2 4f14 5d10 6p4
Electronegativity (Pauling scale): 2
Atomic radius (van der Waals): 197 pm
Ionization energy: 8.417 eV
Electron affinity: 1.9 eV
Oxidation states: +4, +2
Standard state: Solid
Melting point: 527 K
Boiling point: 1235 K
Density: 9.32 g/cm³
Chemical group: Metalloid
Year discovered: 1898

Source and provenance

Original source: pubchem.ncbi.nlm.nih.gov
Published on Koskamo by: Koskamo
Citation version: Document v1
Reuse: PubChem periodic table data (NIH/NLM, pubchem.ncbi.nlm.nih.gov/ptable); group and period from Jefferson Lab via PubChem

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Version history

Published by Koskamo2026-10-04
Version 1