Selenium (Se)
Atomic number
34
Mass number
79
Electronegativity
2.55
Covalent radius
1.17
Atomic radius
1.22
Melting point
494.0
Boiling point
958.0
Density
4.79
Specific heat
0.32
Electrical conductivity
1.0e-6
Thermal conductivity
0.0204