Barium

Alkaline earth metal

Symbol: Ba

Atomic Number: 56

Standard State: Solid

Atomic Mass: 137.33

Electron Configuration: [Xe]6s2

Electronegativity: 0.89

Atomic Radius: 268

Ionization Energy: 5.212

Melting Point: 1000

Boiling Point: 2170

Density: 3.62

Year Discovered: 1808