Potassium

Alkali Metal

Potassium (K) is element 19, an alkali metal, in period 4 and group 1 of the periodic table. Its standard atomic weight is 39.098, it melts at 63.5 °C and boils at 759 °C. Discovered by Humphry Davy, 1807.

Atomic Number19

SymbolK

NamePotassium

Atomic Weight39.098 u

CategoryAlkali Metal

Period4

Group1

Melting Point63.5 °C

Boiling Point759 °C

Density0.862 g/cm³

Electron Config[Ar] 4s1

Discovered ByHumphry Davy, 1807

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