eFunda: General Information on Element Selenium
engineering fundamentals Element Information: Selenium
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Selenium
 
34
Se
78.96
 Atomic Number 34
Atomic Weight 78.96
Electron Config. 2-2-6-2-6-10-2-4
Electron configuration order: 1s-2s-2p-3s-3p-3d-4s-4p-4d-4f-5s-5p-5d-5f-6s-6p-6d-7s

Mechanical Properties Conditions
Phase Temp. (K) Pressure (Pa)
Density 4800 kg/m3 Solid  0  0 
Modulus of Elasticity 55.158 GPa Solid  0   
Poisson Ratio 0.33 Solid     
Thermal Expansion Coefficient 3.700 × 10-5 /K Solid  293.15  

Electrical Properties Conditions
Temp. (K) Note
Electrical Resistivity 1.200 × 10-7 W-m 273.15  

Thermal Properties Conditions
Temp. (K) Pressure (Pa)
Melting Temperature 494.15 K   101325 
Boiling Temperature 958.15 K   101325 
Critical Temperature 1766.15 K    
Fusion Enthalpy 66.2 J/g 0  101325 
Vaporization Enthalpy 1209.22 J/g 0  101325 
Heat Capacity 321 J/kg-K 298.15 100000 

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