Atomic Element Z = 84 • Post-Transition Metal
Polonium (Po) — Atomic Data, Electron Shells & Reactions
Polonium (symbol Po, atomic number 84) has a standard atomic weight of 209 u and ground-state configuration [Xe] 4f14 5d10 6s2 6p4.
Atomic Number (Z)
84
IUPAC Symbol
Po
Standard Atomic Weight
209 g/mol
Period / Group / Block
6 / 16 / p-block
Condensed Electron Config
[Xe] 4f14 5d10 6s2 6p4
Full Subshell Config
1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 4f14 5s2 5p6 5d10 6s2 6p4
Principal Shell Occupancy
[2, 8, 18, 32, 18, 6]
Pauling Electronegativity
2
First Ionization Energy
812 kJ/mol
Covalent Radius
140 pm
Melting Point
527 K (253.85 °C)
Boiling Point
1235 K (961.85 °C)
Density
9.32 g/cm³
Oxidation States
+4, +2
Po (Z=84) — Valence shell highlighted in vermilion