31
Ga
gallium
69.723

General properties

Group
group 13
Period
period 4
Category
post-transition metals
Standard atomic weight
69.723(1)
Melting point
302.9146 K (29.7646 °C)
Boiling point
2673 K (2400 °C)
Phase at STP
solid

Additional properties

Block
p-block
Electron configuration
[Ar] 3d¹⁰ 4s² 4p¹
Electrons per shell
2, 8, 18, 3
Electronegativity
1.81
Density
5.91 g/cm³
Oxidation states
−5, −4, −3, −2, −1, +1, +2, +3 (an amphoteric oxide)
CAS Number
7440-55-3