Symbol
Ba
Atomic Number
56
Atomic Mass
137.327
Protons
56
Neutrons
81
Electrons
56
Type
Alkaline Earth Metal
Isotopes
Barium-130, Barium-132, Barium-134, Barium-135, Barium-136, Barium-137, Barium-138
Discovery Year
1772
Discovered By
Carl Wilhelm Scheele
Group
2
Period
6
Boiling Point
1640°C
Melting Point
727°C
Electron Configuration
[Xe] 6s²
Density (g/cm³)
3.62
Crystal Structure
Body-centered cubic
Magnetism
Paramagnetic
Abundance in Earth's Crust
0.042%
Phase at Room Temperature
Solid