Discovered By: Paul-Emile Lecoq de Boisbaudran
Discovery year: 1875

The following table showing some properties of Gallium(Ga):

Table Example
Atomic number 31
Group 13
Period 4
Block p
Electrons 31
Protons 31
Neutros 39
Atomic weight 69.723
Oxidation states +3
Ionic charge Ga^3+


Table Example
Electrons per shell K2 L8 M18 N3
Electrons configuration 1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^10 4p^1
Atomic radius 136 pm
Covalent radius 122 pm
Van der Waals radius 187 pm
Boiling point 2204°C
Melting point 29.76°C
Phase Solid
Fusion heat 5.59 kJ,mnol^-1
Thermal expansion 1.2*10^-4 K^-1


Table Example
Vaporization heat 256 kJ.mol^-1
olor Silver
Brinell hardness 60 MPa
Density 5904 kg.m^-3
Liquid density 6095 kg.m^-3
Mohs hardness 1.5
Sound speed 2740 m.s^-1
Electric type Conductor
Magnetic type Diamagnetic
Electronegativity 1.81


Table Example
valence 3
Electron affinity 28.9 kJ.mol^-1
Radioactive No
Neutron cross section 2.9 barn
First ioniozation energy 578.8 kJ.mol^-1