Plutonium was discovered by Glenn Seaborg, Edwin McMillan, Joseph Kennedy, and Arthur Wahl in 1940.
Name: Plutonium
Symbol: Pu
Atomic number: 94
Atomic weight: 244.06
State: solid
Group, period, block: n/a, 7, f
Color: silvery-white
Classification: actinide
Electron configuration: 5f6 7s2
2,8,18,32,24,8,2
Physical properties
Density: 19.816 g/cm-3
Melting point: 912.5 K,639.4 °C,1182.9 °F
Boiling point: 3505 K,3228 °C,5842 °F
Atomic properties
Oxidation states: 8, 7, 6, 5, 4, 3, 2, 1
Electronegativity: 1.828 (Pauling scale)
Ionization energies: 1st: 584.7 kJ·mol-1
Covalent radius: 187±1 pm
Van der Waals radius: no data
- Pu
Electron Configuration
Isotopes
Plutonium is an artificial element, it has no stable isotopes. The isotope first synthesized was 238Pu in 1940.