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Tuesday, April 23, 2013


  • Fermium (Fm)  is a rare earth element with atomic weight 257 which has melting point 1800K.
  • Eighth discovered transuranium element in the actinide series.
  • An element 254Fm and its heavier isotopes can be produced by intense neutron irradiation of lower elements such as plutonium using a process of successive neutron capture interspersed with beta decays until these mass & atomic numbers are reached.
  • After Production, fermium is separated from other actinides & from lanthanoid fission products by ion exchange chromatography.

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