Curium

Radioactive element
Latin nameCurium
English nameCurium
chemical symbolCm
atomic number96
relative atomic mass(247,0703)
period7
groupIII.B
classificationactinides
discovery year1944
discovererSeaborg, James,
Ghiorso
melting point [°C]1340
boiling point [°C]3110
density [g cm-3]13,51
electronegativity [Pauling]1,3
oxidation statesIII, IV
electron configuration[Rn]5f7 6d1 7s2
1. ionizing potential [eV]6,02
state at normal conditionssolid

Curium is an artificial radioactive metallic element. In nature not occur. Practical use is only for scientific research.