28183232186
Category
Transition metal
Relative atomic mass
269.1087
Density
13.51
Melting point (°C)
1342
Boiling point (°C)
3100
Electronegativity (Pauling)
1.28
Half-life
53 ms
Discovery year
1949
Discovered by
Electrons: 116
Protons: 116
Neutrons: 177
Decay chain