Symbol:
Ra
Atomic Number:
88
Atomic Weight:
226.0254
Element Classification:
Discovered By:
Pierre and Marie Curie-Sklodowska
Discovery Date:
1898 (France/Poland)
Name Origin:
Latin: radius (ray).
Density (g/cc):
(5.5)
Melting Point (K):
973
Boiling Point (K):
1413
Appearance:
Silvery white, radioactive element
Atomic Radius (pm):
n/a
Atomic Volume (cc/mol):
45.0
Covalent Radius (pm):
n/a
Ionic Radius:
143 (+2e)
Specific Heat:
0.120
Fusion Heat (kJ/mol):
(9.6)
Evaporation Heat (kJ/mol):
(113)
Thermal Conductivity (@25°C W/m K):
(18.6)
Debye Temperature (K):
n/a
Pauling Negativity Number:
0.9
First Ionizing Energy (kJ/mol):
509.0
Oxidation States:
2
Electronic Configuration:
[Rn] 7s2
Lattice Structure:
(n/a)
Lattice Constant:
n/a
Lattice C/A Ratio:
n/a
