281832186
Category
Post-transition metal
Relative atomic mass
208.98
Density
9.32
Melting point (°C)
254
Boiling point (°C)
962
Electronegativity (Pauling)
2
Half-life
138.4 d
Discovery year
1898
Discovered by
Electrons: 84
Protons: 84
Neutrons: 125
Decay chain