56
137.33 u
Ba
Barium
Alkaline Earth Metal
Atomic Structure
Physical State
Group
2
Period
6
Block
s
Electron Configuration
[Xe] 6s²
Physical Properties
Atomic Mass:
137.33 u
Electronegativity:
0.89
Atomic Radius:
260 pm
Ionization Energy:
5.212 eV
Density:
3.51 g/cm³
Melting Point:
1000 K
Boiling Point:
2170 K
Historical Information
Discovered By:
Carl Wilhelm Scheele
Year Discovered:
1774