28183232184
Category
Post-transition metal
Relative atomic mass
269.1087
Density
13.51
Melting point (°C)
1342
Boiling point (°C)
3100
Electronegativity (Pauling)
1.28
Half-life
1.9 s
Discovery year
1949
Discovered by
Electrons: 114
Protons: 114
Neutrons: 175
Decay chain