Stable isotope Gallium (Ga)

Isotope Z(p) N(n) Atomic Mass Natural Abundance Enrichment Level Chemical Form
Ga-69 31 38 68.925581 60.11% ≥99.60% Metal
Ga-69 31 38 68.925581 60.11% ≥99.60% Oxide
Ga-71 31 40 70.924707 39.89% ≥99.80% Metal
Ga-71 31 40 70.924707 39.89% ≥99.80% Oxide

Properties of Gallium

Name Gallium
Symbol Ga
Atomic number 31
Atomic weight 69.723
Standard state Solid at 298 °K
CAS Registry ID 7440-55-3
Group in periodic table 13
Group name None
Period in periodic table 4
Block in periodic table p-block
Color Silvery white or gray
Classification Metallic
Melting point 29.6 °C
Boiling point 2403 °C
Thermal conductivity 28.1 W/(m·K) at 302.93 °K
Electrical resistivity 17.4 µΩ·cm at 20 °C
Electronegativity 1.6
Specific heat 0.372 J/g mol at 20 °C
Heat of vaporization 256 kJ·mol-1 
Heat of fusion 5.59 kJ·mol-1
Density of liquid 6.095 g/cm
Density of solid 5.91 g/cm
Electron configuration [Ar]3d104s24p
Ionic radius Ga3+: 1.13 Å
Most common oxidation state +3 (also exhibits +2 and +1)