Selenium

Element information

Atomic properties

Mass: 78.97 u

Electron configuration: [Ar]4s2 3d10 4p4

Oxidation states: +6, +4, -2

Electronegativity: 2.55

Physical properties

Density: 4.809 g/cm³

Standard state: solid

Melting point: 493.65 K

Boiling point: 958 K

₃₄Se

Part of the Periodic Table 2 collection

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