Do you want to hear about potassium?.........K

The Basics

Symbol: K

Atomic Number: 19

Atomic Weight: 39.098

Group 1 Period 4- Alkali Metal

Color: Silvery White

Classification: Metal

Melting Point: 63.38 °C

Boiling Point: 759 °C

Description: Least dense metal, sot and can easily be cut, silvery surface.


  • Potassium was discovered by Sir Humphrey Davy in 1807 in England. Since its not found in nature, he used electrolysis to create it.
  • Until the 18th Century, scientists thought potassium and sodium were the same thing
  • Potassium carbonate was used to make soap


  • Makes up 1.5% of the weight of the Earth's crust
  • Vital to plant growth; found in most soils
  • Potassium is essential to humans: It helps your heat and lungs work and its a vital part of our diet.

Out and About

  • Potassium is too reactive to be found alone in nature
  • Found in the earths crust
  • Found in potash (potassium carbonate)
  • Mined in USA, Germany, ect.
  • Potassium and Sodium are both found in seawater but potassium is less abundant


  • Very Reactive
  • Oxidizes in air very fast
  • Decomposes in water
  • Catches fire in reaction with water
  • Density: 856 kg

Interesting Facts

  • Potassium gives a lilac color to flames
  • The same method is used to gain potassium today as they used when it was discovered
  • Made in a lavatory
  • Very abundant in the human body
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