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Metalloids · Group 14 · Period 3

Atomic properties

Atomic number	14
Symbol	Si
Standard atomic weight	28.085
Classification	Metalloids
Group	14
Period	3
Block	p-block
Electron configuration	[Ne] 3s2 3p2
Electronegativity (Pauling)	1.90
Common oxidation states	+4, -4

Physical properties

Phase at 20 °C	Solid
Density	2.329 g/cm³
Melting point	1414 °C
Boiling point	3265 °C
Discovered	1824
CAS number	—

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