Characteristics of the element

Symbol: Se
Name: Selenium
Latin name: Selenium
Atomic number: 34
Atomic mass: 78,96
Melting point: 221  (°C)
Boiling point: 684,7  (°C)
Density 4,98  (g/cm 3 )
Electronegativity: 2,5
Oxidation number: -II,II,IV,VI
Number of neutrons: 45
Crystal structure: Hexagonal
Chemical serie: Nonmetals
Color:  gray
Electron configuration:  2-8-18-6
Year of discovery::  1817


Pure material

SymbolNameNext information
SeSeleniummore


Alloys

SymbolNameNext information
Bi+SeBismut-Selenmore
Pb+SeOlovo-Selenmore


Compounds

SymbolNameNext information
TaSe2Tantal selenmore























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