SymbolPo
Latin namePolonium
Atomic number84
Period6
Element categoryMetals
Relative atomic mass208.9824
GroupVI.A
Electronegativity
2.0
Oxidation numbers
2, 4, 6
Electron configuration
1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 5s2 5p6 4f14 5d10 6s2 6p4
Density [g/cm3]
9.3
State
Solid
Melting point [°C]
254
Boiling point [°C]
962
Atomic radius [pm]
135
Thermal conductivity [W m-1K-1]
20
Discovery
1898
1.st ionization energy [eV]
8.4167
Stable isotopes
0
Unstable isotopes
33