Periodic Table of the Elements Curium

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curium

World Encyclopedia | 2005 | © World Encyclopedia 2005, originally published by Oxford University Press 2005. (Hide copyright information) Copyright

curium (symbol Cm) Synthetic radioactive metallic element of the actinide series in the periodic table. It was first made in 1944 by the US nuclear chemist Glenn Seaborg and his colleagues by the alpha-particle bombardment of plutonium-239 in a cyclotron. Silvery in colour, curium is chemically reactive, intensely radioactive and is toxic if absorbed by the body. It provides power for orbiting satellites. Properties: at.no. 96; r.d. (calculated) 13.51; m.p. 1340°C (2444°F); 14 isotopes, most stable Cm247 (half-life 1.6 × 107 yr).
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Periodic Table of the Elements: Curium

The Columbia Encyclopedia, Sixth Edition | 2008 | The Columbia Encyclopedia, Sixth Edition. Copyright 2008 Columbia University Press. (Hide copyright information) Copyright

Periodic Table of the Elements: Curium

Periodic Table of the Elements: Curium
Atomic Number: 96
Atomic Symbol: Cm
  Curium
Atomic Weight: (247)
Electron Configuration: 2 · 8 · 18 32 · 25 9 · 2

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