Chemical data for Ba - Barium | PhysLink.com

Barium

 Barium 
Ba
Atomic Number: 56
Atomic Weight: 137.327
Element Type: Alkali Earth Metal
Crystal Structure: Cubic Body Centered
Melting Point: 727.0°C = 1340.6°F = 1000.15 K
Boiling Point: 1897.0°C = 3446.6°F = 2170.15 K
Critical Temp: °C = °F = K
Atomic Radius: 2.78 Å (Å = Angstrom = 10-10 m)
Covalent Radius: 1.98 Å
Electronegativity: 0.89

History

(Gr. barys, heavy) Baryta was distinguished from lime by Scheele in 1774; the elementwas discovered by Sir Humphrey Davy in 1808.


Sources

It is found only in combination with other elements, chiefly with sulfate and carbonateand is prepared by electrolysis of the chloride.