Americium

Radioaktivní prvek
Latin nameAmericium
English nameAmericium
chemical symbolAm
atomic number95
relative atomic mass(243,0614)
period7
groupIII.B
classificationactinides
discovery year1944
discovererSeaborg, James,
Morgan, Ghiorso
melting point [°C]994
boiling point [°C]2607
density [g cm-3]13,67
electronegativity [Pauling]1,3
oxidation statesII, III, IV, V, VI
electron configuration[Rn]5f7 7s2
specific heat [J g-1K-1]0,11
heat of fusion [kJ mol-1]14,4
1. ionizing potential [eV]5,993
state at normal conditionssolid

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