Potassium

Alkali metal

Symbol: K

Atomic Number: 19

Standard State: Solid

Atomic Mass: 39.0983

Electron Configuration: [Ar]4s1

Electronegativity: 0.82

Atomic Radius: 275

Ionization Energy: 4.341

Melting Point: 336.53

Boiling Point: 1032

Density: 0.89

Year Discovered: 1807