Selenium (thing)

Selenium
Symbol: Se
Atomic Number: 34
Atomic Weight: 78.96
Boiling Point: 958 K
Melting Point: 494 K
Density at 300 K: 4.79 g/cm³
Covalent radius: 1.16
Atomic radius: 1.22
Atomic volume: 16.50 cm³/mol
First ionization potental: 9.752 V
Specific heat capacity: 0.32 J g^-1 K^-1
Thermal conductivity: 2.04 W m^-1 K^-1
Electrical conductivity: 8 10⁶ Ω^-1m^-1
Heat of fusion: 5.54 kJ/mol
Heat of vaporization: 26.32 kJ/mol
Electronegativity: 2.55 (Pauling's)

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