Barium

Barium takes it name from the Greek word barys for heavy. Barium was first discovered in 1774 by Carl Scheele, but was not isolated as a pure metal until 1808 when Sir Humphry Davy electrolyzed molten barium salts. The name Barium comes from the Greek word barys, which means heavy. Barium is a soft, silvery white metal, and has a melting point of 1000 K. Because of its reaction to air, barium cannot be found in nature in its pure form but can be extracted from the mineral barite.

• Atomic Number = 56        
• Mass = 137.3 g mol^​-1        
• Electrion Configuration = [Xe]6s²
• Density = 3.51 g cm^-3