Curium Facts

Curium Chemical & Physical Properties

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


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Helmenstine, Anne Marie, Ph.D. "Curium Facts." ThoughtCo, Mar. 10, 2017, Helmenstine, Anne Marie, Ph.D. (2017, March 10). Curium Facts. Retrieved from Helmenstine, Anne Marie, Ph.D. "Curium Facts." ThoughtCo. (accessed March 21, 2018).