Symbol Pu Atomic radius: pm 151 Fusion: kJ/Mole 2.82
Name Plutonium Ionic radius: pm (+4)86 Boiling point: C 3228
Atomic number 94 Electron affinity - Melting point: C 640
Atomic weight 244.0 1st  ion potential 6.06 Specific Heat Cap: J/(g K) -
Classification Trans metal Natural form Solid Thermal Cond: W/(cm K) 0.07
Configuration [Rn]5f67s2 Crystal structure Mono Electrical Cond 0.00666
Oxidation states 3,4,5,6 Density 19.7 Abundance: mg/kg-crust Synthetic
Electronegativity 1.3 Vaporization: kJ/Mole 344.0    
Plutonium was first produced  artificially in 1940 as the isotope plutonium-238 by Glenn T. Seaborg, Edwin M. McMillan, Joseph W. Kennedy, and Arthur C. Wahl.  Later, traces were found in uranium ores where it was naturally produced. Uses - weapon fuel, pacemakers