• Name: Potassium

  • Symbol: K

  • Number of Energy Levels: 4

  • Electrons on the outer energy level: 1

  • Atomic Number: 19

  • Atomic Mass: 39.0983 Amu

  • Protons / Electrons: 19

  • Neutrons: 20

  • Density: 0.862 g/cm3

  • Classification: Alkali Metal

Top 17 interesting facts about Potassium

  • Potassium was discovered in 1807 by Sir Humphrey Davy.
  • Its symbol K comes from the Latin word "kalium" and its name derives from the word "potash".
  • Potassium's melting point is at 63.65 °C (336.8 K, 146.57 °F) and its boiling point is at 774.0 °C (1047.15 K, 425.2 °F).
  • Potassium is silvery and very soft metal that oxidizes very fast in the air.
  • Potassium reacts very violently with water.
  • The reaction with water generates a lot of heat that ignite the hydrogen emitted by the reaction.
  • Potassium has 24 isotopes but only three of them occur naturally and are stable 39-K, 40-K, and 41-K.
  • The potassium's isotope 40-K is radioactive.
  • In nature, potassium can be found only in ionic salts.
  • Potassium ions are used by all living cells.
  • Potassium is very less dense; only lithium is lesser dense than potassium.
  • Potassium reacts very easy with oxygen forming potassium peroxide and with hydrogen forming potassium hydroxide.
  • Potassium is created by the type 2 supernovas.
  • Potassium represents 2.6% of the Earth's crust.
  • It is the 7th most abundant element in the Earth's crust, 17th most abundant in entire planet and 20th most abundant in our solar system.
  • Potassium is used as a fertilizer in agriculture.
  • Potassium is an important nutrient in human life so it has many applications in food industry.