The periodic table/Potassium

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Discovery

Potassium was discovered by Sir Humphrey Davy in 1807. This alkali metal was the first metal that was isolated by electrolysis. The name comes from the Arabic word, القَلْيَه‎ (al-qali), meaning Plant Ashes.

Quick Facts

Name: potassium atom Symbol: K Atomic Mass: 39 Classification: alkali metals

Protons: 19 Electrons: 19 Neutrons: 20 Color: silvery-white

Discovery in: 1807 Density: 0.89 g/cm3 Crystal Structure: cubic Melting Point: 49 °C Boiling Point: 774 °C Common Uses: glass, soap, substitute for table salt, fertilizers, gunpowder, medical uses

See also

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