Periodic table of the elements
AluminiumSiliconPhosphorus
14
Si
Silicon
28.0855
2
8
4
14
Si
Silicon
28.0855
2
8
4
General
NameSilicon
SymbolSi
Number14
Chemical seriesMetalloids
Group / Period14 / 3
Blockp-block
CAS registry number7440-21-3

Physical properties
Statesolid
Density2.33 g/cm3
Melting point1693 K (1420 °C, 2577 °F)
Boiling point3538 K (3265°C, 5909°F)
Critical point

Atomic properties
Atomic Weight28.0855 g/mol
Crystal structurediamond cubic
Electronegativity1.90
Atomic radius110 pm
Atomic radius (calculated)111 pm
Electron configuration[Ne] 3s2 3p2
Electrons per shell2, 8, 4
Number of protons14
Number of neutrons14

Other languages
SpanishSilicio
PortugueseSilí­cio
FrenchSilicium
GermanSilicium
ItalianSilicio
RussianКремний
PolishKrzem
Chinese
Arabicسليكون
TurkishSilisyum
DutchSilicium


Periodic table of the elements
AluminiumSiliconPhosphorus