Symbol: Cm
Atomic Number: 96
Atomic Weight: 247.0703
Element Classification: Radioactive Rare Earth Element (Actinide Series)
Discovered By: G.T.Seaborg, R.A.James, A.Ghiorso
Discovery Date: 1944 (United States)
Name Origin: Named in honor of Pierre and Marie Curie.
Density (g/cc): 13.51
Melting Point (K): 1340
Boiling Point (K): n/a
Appearance: Silvery, malleable, synthetic radioactive metal
Atomic Radius (pm): 299
Atomic Volume (cc/mol): 18.28
Covalent Radius (pm): n/a
Ionic Radius: n/a
Specific Heat (@20°C J/g mol): n/a
Fusion Heat (kJ/mol): n/a
Evaporation Heat (kJ/mol): n/a
Thermal Conductivity (@25°C W/m K):
Debye Temperature (K): n/a
Pauling Negativity Number: 1.3
First Ionizing Energy (kJ/mol): (580)
Oxidation States: 4, 3
Electronic Configuration: [Rn] 5f⁷ 6d¹ 7s²
Lattice Structure: n/a
Lattice Constant (Å): n/a
Lattice C/A Ratio: n/a