Element: Curium (Cm)

Element (Atom) NameCurium
Physical state at room temperatureSolid
Element ClassificationMetal
Group NameActinide
Period Number (Periodic table) 7
Group number (Periodic table)None
Atomic number96
Atomic weight247 (Ref: Jlab-ele096)
Atomic Radius245 pm (Van der Waals) (Ref: Lanl-96)
Density13.51 g/cm3 (Ref: Jlab-ele096)
Melting point1345°C (Ref: Jlab-ele096)
1340 °C (Ref: Lanl-96)
Boiling point~3100°C (Ref: Jlab-ele096, Lanl-96)
Electron shell configuration1s2 
2s2 2p6 
3s2 3p6 3d10 
4s2 4p6 4d10 4f14 
5s2 5p6 5d10 5f7
6s2 6p6 6d1
Oxidation States+3 (Ref: Jlab-ele096)
6, 4, 3, 2 (Ref: Lanl-96)
Ionization Energy6.02 eV (Ref: Jlab-ele096)
5.99141 eV (Ref: Nist-96)
Number of Stable Isotopes0
InChIInChI=1S/Cm (Ref: Pubchem-96)
RemarksRadioactive, Artificially Produced (Ref: Jlab-ele096)


  • Jlab-ele096: https://education.jlab.org/itselemental/ele096.html
  • Lanl-96: https://periodic.lanl.gov/96.shtml
  • ciaaw-atomic-weights: https://www.ciaaw.org/atomic-weights.htm
  • Nist-96: https://physics.nist.gov/cgi-bin/Elements/elInfo.pl?element=96
  • Pubchem-96: https://pubchem.ncbi.nlm.nih.gov/element/96
  • science.co.il: https://www.science.co.il/elements/

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