Chemical properties – silicon symbol, electronic configuration, density





Silicon is the most common metalloid. It has many industrial uses. It is the principal component of most semiconductor devices, most importantly integrated circuits or microchips. It is widely used in semiconductors because it remains a semiconductor at higher temperatures than the semiconductor germanium and because its native oxide is easily grown in a furnace and forms a good semiconductor/dielectric interface. In the form of silica and silicates, silicon forms useful glasses, cements, and ceramics. It is also a constituent of silicones, a class-name for various synthetic plastic substances made of silicon, oxygen, carbon and hydrogen, often confused with silicon itself. Silicon is an essential element in biology, although only tiny traces of it appear to be required by animals. It is much more important to the metabolism of plants, particularly many grasses, and silicic acid forms the basis of the striking array of protective shells of the microscopic diatoms.

Chemical Properties.

Appearance Grey lustrous solid or grey powder
Atomic Number 14
Atomic Weight 28.0855 g/mol
Block p
Boiling Point 3265 °C
CAS Number 7440-21-3
Class 4.1
Crystal Structure Diamond cubic
Density 2.33 g/cm3
EINECS Number 231-130-8
Electron Configuration 1s2 2s2 2p63s3p2
Group 14
Ionization Energy 786.5 kJ/mol
Melting Point 1414 °C
NFPA 704 H-2,F-2,R-1,C-NA
Oxidation State 4,3,2 ,1,-1,-2,-3,-4
PG 3
Period 3
RTECS Number VW0400000
Symbol Si


Silicon producers/suppliers –