84Po
Polonium
Post-Transition MetalPolonium (Po) is element 84, a post-transition metal, in period 6 and group 16 of the periodic table. Its atomic mass is usually given as 209, it melts at 254 °C and boils at 962 °C. Discovered by Marie Curie, 1898.
Atomic Number84
SymbolPo
NamePolonium
Atomic Weight209 u
CategoryPost-Transition Metal
Period6
Group16
Melting Point254 °C
Boiling Point962 °C
Density9.32 g/cm³
Electron Config[Xe] 4f14 5d10 6s2 6p4
Discovered ByMarie Curie, 1898