Symbol:
Ba
Atomic Number:
56
Atomic Weight:
137.327
Element Classification:
Discovered By:
Sir Humphrey Davy
Discovery Date:
1808 (England)
Name Origin:
Greek: barys (heavy or dense).
Density (g/cc):
3.5
Melting Point (K):
1002
Boiling Point (K):
1910
Appearance:
Soft, slightly malleable, silver-white metal
Atomic Radius (pm):
222
Atomic Volume (cc/mol):
39.0
Covalent Radius (pm):
198
Ionic Radius:
134 (+2e)
Specific Heat:
0.192
Fusion Heat (kJ/mol):
7.66
Evaporation Heat (kJ/mol):
142.0
Thermal Conductivity (@25°C W/m K):
(18.4)
Debye Temperature (K):
n/a
Pauling Negativity Number:
0.89
First Ionizing Energy (kJ/mol):
502.5
Oxidation States:
2
Electronic Configuration:
[Xe] 6s2
Lattice Structure:
Body-Centered Cubic(BCC)
Lattice Constant:
5.020
Lattice C/A Ratio:
n/a
