Potassium

Discovered

1807

Density

0.89 g/cm³

Melts

64 °C

147 °F
337 °K

Boils

764 °C

1408 °F
1037 °K

Show sources

University of Colorado Boulder

Harper College

PubChem (NIH.gov)

Contributed by collector no. 2

Cubes of slightly brassy Lithium , gray Sodium , and silvery Potassium metal in ampoules under inert gas. These are extremely reactive metals, so getting them into these precise shapes is incredibly difficult!

Contributed by collector no. 3

The Alkali Metals group: Lithium rod, Sodium , Potassium , Rubidium , and Caesium . All samples are inside ampoules, because these elements are extremely reactive to the Oxygen in air.

Contributed by collector no. 6

Heavily oxidized chunk of Potassium metal in a bottle of oil, itself in what appears to be a sealed bag

Contributed by collector no. 3

Ampoule of Potassium

Contributed by collector no. 2

Potassium metal safely encased in a cube-shaped glass ampoule about 1 cubic cm in size

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