Curium Facts

Curium

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

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), Lange's Handbook of Chemistry (1952), CRC Handbook of Chemistry & Physics (18th Ed.)

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