14
Si
silicon
28.085

General properties

Group
group 14
Period
period 3
Category
metalloids
Standard atomic weight
28.085
[28.084, 28.086]
Melting point
1687 K (1414 °C)
Boiling point
3538 K (3265 °C)
Phase at STP
solid

Additional properties

Block
p-block
Electron configuration
[Ne] 3s² 3p²
Electrons per shell
2, 8, 4
Electronegativity
1.90
Density
2.3290 g/cm³
Oxidation states
−4, −3, −2, −1, 0, +1, +2, +3, +4 (an amphoteric oxide)
CAS Number
7440-21-3