Chemical elements
  Curium
    Isotopes
    Energy
    Production
    Application

Element Curium, Cm





History

The member of actinide or actinoid group of chemical elements - Curium, an element of the actinide series, was first discovered (prepared) in 1944 by Glenn T. Seaborg with co-workers at the Metallurgical Laboratory of the University of Chicago by bombarding plutonium with helium ions. A pure compound, curium hydroxide was synthesized three years later. The element was named for Pierre and Marie (Maria) Curie, by analogy with gadolinium, a rare earth element with similar electron shell structure. The chemical symbol for curium is Cm, in which the first letter C is the initial of Curie and m is the initial of Marie.


Occurrence

Curium does not have stable isotopes. 15 isotopes with mass numbers from 237 to 251 are currently known. The most long-lived of them are 247Cm (T1/2 1.58x107 years) and 248Cm (T1/2 3.4x105 years), alpha-particle sources. The former has been found in the Earth's crust in some radioactive minerals, the parent of 243Pu 235U family.

Neighbours



Chemical Elements

57La
138.9
Lanthanum
72Hf
178.5
Hafnium
73Ta
180.9
Tantalum
95Am
[243.0]
Americium
96Cm
[247.0]
Curium
97Bk
[247.0]
Berkelium

© Copyright 2008-2012 by atomistry.com