Silicon (Si)

Symbol Si
Atomic Number 14
Atomic Weight 28.0855
Group 14 (carbon family)
IVB (Old IUPAC), IVA (CAS)
Period 3
Block p

Planetary Bohr Model of Si
Lewis Dot Diagram of Si

Physical Properties

Density 2.33 g/cm3
Atomic Volume 12.1 cm3/mole
Atomic Radius 1.32 angstroms
Covalent Radius 111 pm
Radioactive No

States

Melting Point 1410.0 °C
Boiling Point 2355.0 °C
Heat Of Fusion 50.2 kJ/mole
Heat Of Vaporization 359.0 kJ/mole

Energy

Electronegativity 1.9 (Pauling Scale)
Electron Affinity -134 kJ/mol
1st Ionization Energy 780 kJ/mol
Specific Heat Capacity 0.7 J g−1 K−1
Thermal Conductivity 148.0 W·m−1·K−1

Electrons and Oxidation

Oxidation States ±4
Electrons Per Shell 2 8 4
Electron Configuration [Ne] 3s2 3p2
1s2 2s2 2p6 3s2 3p2

Translations

English Silicon
Deutsch Silizium
Lëtzebuergesch Silizium
Nederlands Silicium (Kiezel )
Afrikaans Silikon (Kiesel )
Frysk Silisium
Dansk Silicium
Svenska Kisel
Norsk Silisium
Íslenska Ksill
Føroysk Silicium
Latin Silicium
Français Silicium
Español Silicio
Catalana Silici
Occitana Silici
Português Silcio
Galego Silicio
Italiano Silicio
Furlan Silici
Român Siliciu
Moldavian Siliciu
Armãneashte Silitsiumu
Русский ???????
Українска ???????
Byelorussian ???????
Polska Krzem
Kaszëbsczi Krzm
Čech K?emk
Slovenský Kremk
Slovenščina Silicij
Hrvatska Silicij
Српски ??????j??
Bosnian Silicij
Македонски ????????
Български ???????
Lietuviškai Silicis
Lao Sil?cijs
Sudovian Silicijan
Cymraeg Slicon
Gaeilge na hÉireann Sileacn
Gàidhlig na h Sileacon
Gaelg Vanninagh Shillagon
Cornish Sylycon
Brezhoneg Silisiom
Ελληνική ???????
Shqip Silicium
Ossetian ???????
Euskera Silizioa
Georgian ?????????
Suomi Pii
Eesti Rni
Magyar Szilcium
Türkçe Silisyum
Kazakh ???????
Uzbek ???????
Tajik Silitziy
Mongolian ??????
日本語 ??? [keiso]
中国话 ?
ไทย ???????
Vietnamese Silic
Bahasa Melayu Silikon
العربيه ??????
Il-Malti Silikon
עברית ????
Esperanto Silicio

History

Discovered In
1824
Discovered By
Jns Jacob Berzelius
Discovered At
Sweden
Word Origin
From the Latin word "silicis" meaning "flint"