Curium Facts - Periodic Table of the Elements

Curium Facts - Periodic Table of the Elements Periodic Table of the Elements Curium  Basic Facts Atomic Number: 96 Symbol: Cm Atomic Weight: 247.0703 Discovery: G.T.Seaborg, R.A.James, A.Ghiorso, 1944 (United States) Electron Configuration: [Rn] 5f7 6d1 7s2 Curium Physical Data Atomic Weight: 247.0703 Element Classification: Radioactive Rare Earth Element (Actinide Series) Name Origin: Named in honor of Pierre and Marie Curie. Density (g/cc): 13.51 Melting Point (K): 1340 Appearance: silvery, malleable, synthetic radioactive metal Atomic Radius (pm): 299 Atomic Volume (cc/mol): 18.28 Pauling Negativity Number: 1.3 First Ionizing Energy (kJ/mol): (580) Oxidation States: 4, 3 References: Los Alamos National Laboratory (2001), Crescent Chemical Company (2001), Langes Handbook of Chemistry (1952), CRC Handbook of Chemistry Physics (18th Ed.) Return to the Periodic Table Chemistry Encyclopedia