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Elemental Periodic Table


Atomic number: 34
Atomic weight: 78.96
Symbol: Se
Group number: 16
Electronic configuration: [Ar].3d10.4s2.4p4

Physical data

Standard state: solid at 298 K
Colour: grey, metallic lustre
Density of solid at ambient temperature/kg m-3: 4819
Molar volume/cm3: 16.42

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