Symbol
Pu
Atomic Number
94
Atomic Mass
244
Protons
94
Neutrons
150
Electrons
94
Type
Actinide
Isotopes
Plutonium-238, Plutonium-239, Plutonium-240, Plutonium-241, Plutonium-242
Discovery Year
1940
Discovered By
Glenn T. Seaborg, Edwin McMillan
Group
3
Period
7
Boiling Point
3166°F
Melting Point
639°F
Electron Configuration
[Rn] 7s² 5f⁶
Density (g/cm³)
19.86
Crystal Structure
Cubic
Magnetism
Paramagnetic
Abundance in Earth's Crust
Trace
Phase at Room Temperature
Solid