• Name: Argon

  • Symbol: Ar

  • Number of Energy Levels: 3

  • Electrons on the outer energy level: 8

  • Atomic Number: 18

  • Atomic Mass: 39.948 Amu

  • Protons / Electrons: 18

  • Neutrons: 22

  • Density: 1.784 g/cm3

  • Classification: Noble Gas

Top 15 interesting facts about Argon

  • Argon was discovered in 1894 by Sir William Ramsay.
  • Its name derives from the Greek word "argon" which means "inactive".
  • Argon is the third most common gas in the Earth atmosphere.
  • There is 24 times more argon in the Earth atmosphere than carbon dioxide.
  • Argon is a very stable element making almost no chemical reaction with other elements.
  • Argon's melting point is at -189.3 °C (83.85 K, -308.74 °F) and boiling point at -186.0 °C (87.15 K, -302.8 °F).
  • Argon is produced from the distillation of liquid air.
  • Worldwide, every year 700,000 tones of argon are produced.
  • Argon is mostly used in lighting industry and welding process.
  • Argon is colorless and odorless.
  • Argon is a nonflammable and nontoxic gas.
  • E938 is argon code of European food additive (used in food packaging to extend the life of the content).
  • American Declaration of Independence and American Constitution are stored in cases fulfilled with argon gas.
  • Energy efficient windows use argon for thermal insulation between the glass layers.
  • Argon has 22 known isotopes; Ar-39 is used to determine the age of ice, ground water, and igneous rocks.