94Pu

Plutonium

Actinide

Plutonium (Pu) is element 94, an actinide, in period 7 of the periodic table. Its atomic mass is usually given as 244, it melts at 640 °C and boils at 3228 °C. Discovered by Glenn T. Seaborg, 1940.

Atomic Number94

SymbolPu

NamePlutonium

Atomic Weight244 u

CategoryActinide

Period7

Melting Point640 °C

Boiling Point3228 °C

Density19.84 g/cm³

Electron Config[Rn] 5f6 7s2

Discovered ByGlenn T. Seaborg, 1940

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