PERIODIC TABLE

Selenium

Atomic No. 34 Se Selenium

About Selenium

Selenium is a nonmetal with atomic number 34 that belongs to the chalcogen group alongside sulfur and tellurium. Zinc selenide is used for infrared windows, lenses and carbon dioxide laser optics. Selenium is also used in glass manufacture and photoconductive materials, linking its chemistry to both optical components and electronic applications.

Properties

Atomic Number
34
Atomic Symbol
Se
Atomic Mass
78.96
CAS No.
7782-49-2
Density
4.819 g/cm³
Series
other nonmetal
Melting Point
221°C
Boiling Point
685°C
Thermal Conductivity
0.52 W/cm °C
Heat of Fusion
5.4 kJ/mol
Heat of Vaporization
26 kJ/mol
Electronegativity
2.55 pauling
Crystal Structure
Monoclinic

Selenium Products

Browse Lorad materials associated with Selenium and refine the list by chemistry, application, or availability.

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