Gallium - Ga

Symbol: Ga
Atomic Number: 31
Atomic Weight: 69.723
Element Classification: Other Metal
Discovered By: Paul-Emile Lecoq de Boisbaudran
Discovery Date: 1875 (France)
Name Origin: Latin: Gallia (France).

Density (g/cc): 5.91
Melting Point (°K): 302.93
Boiling Point (°K): 2676
Appearance: Soft, blue-white metal
Atomic Radius (pm): 141
Atomic Volume (cc/mol): 11.8
Covalent Radius (pm): 126
Ionic Radius: 62 (+3e) 81 (+1e)
Specific Heat (@20°C J/g mol): 0.372
Fusion Heat (kJ/mol): 5.59
Evaporation Heat (kJ/mol): 270.3
Thermal Conductivity (@25°C W/m K): Debye Temperature (°K): 240.00
Pauling Negativity Number: 1.81
First Ionizing Energy (kJ/mol): 578.7
Oxidation States: 3
Electronic Configuration: [Ar] 3d10 4s2 4p1
Lattice Structure: Orthorhombic (ORC)
Lattice Constant (Å): 4.510
Lattice C/A Ratio: n/a

Mineral Hardness [no units]: 1.5
Brinell Hardness [/MN m-2]: 60

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