K

Potassium

Atomic Number 19 · Metal chunk in mineral oil

A soft, silvery metal that reacts violently with water. Essential for nerve function and found in bananas.

Atomic Mass

39.098 u

Category

Alkali Metal

Phase (STP)

Solid

Density

0.862 g/cm³

Melting Point

63.5 °C

Boiling Point

759 °C

Electronegativity

0.82 (Pauling)

Atomic Radius

220 pm

Electron Configuration

[Ar] 4s1

Discovered

1807 — Humphry Davy

Find Potassium Samples

Sample form: Metal chunk in mineral oil

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