SymbolPu
Latin namePlutonium
Atomic number94
Period7
Element categoryInner transition elements
Relative atomic mass244.0642
GroupIII.B
Electronegativity
1.3
Oxidation numbers
3, 4, 5, 6
Electron configuration
1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 5s2 5p6 4f14 5d10 6s2 6p6 5f6 6d0 7s2
Density [g/cm3]
19.86
State
Solid
Melting point [°C]
641
Boiling point [°C]
3232
Thermal conductivity [W m-1K-1]
6.74
Heat capacity [J K-1g-1]
0.13
Discovery
1940
Young's modulus [GPa]
96
Electrical conductivity [S m-1]
6.7 · 105
Shear modulus [GPa]
43
1.st ionization energy [eV]
6.06
Stable isotopes
0
Unstable isotopes
16