ZINC
Atomic symbol: Zn
Atomic weight: 65.39
Atomic number: 30
Electron configuration: 2-8-18-2
Oxidation states: +2
State of matter: solid
Heavy metal, low melting
Discovered in the 13th century
Boils at 907°C, melts at 419°C
Notes: Zinc is a bluish white lustrous metal, stable in dry air. On exposure to moist air, it becomes covered with a white coating of basic carbonate. It is used extensively in galvanized iron. It is also used as an ingredient in alloys such as bronze, brass, Babbitt metal, German silver, and special alloys for die casting, household utensils, building materials and automotive equipment.
GALLIUM
Atomic symbol: Ga
Atomic weight: 69.723
Atomic number: 31
Electron configuration: 2-8-18-3
Oxidation states: +3
State of matter: solid
Heavy metal, low melting
Discovered in 1875 by Paul-