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Name: Argon
Symbol: Ar
Number of Energy Levels: 3
Electrons on the outer energy level: 8
Atomic number: 18
Atomic Mass: 39.948 Amu (Atomic Mass Units)
Protons/Electrons: 18
Neutrons: 22
Density: 1.784 g/cm3
Classification: Noble Gas

Argon | Chemical elements

Argon was discovered in 1894 by Sir William Ramsay. Its name derives from the Greek word argon which means inactive.

Top 13 interesting facts about Argon

  1. Argon is the third most common gas in the Earth atmosphere.
  2. There is 24 times more argon in the Earth atmosphere than carbon dioxide.
  3. Argon is a very stable element making almost no chemical reaction with other elements.
  4. 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).
  5. Argon is produced from the distillation of liquid air.
  6. Worldwide, every year 700,000 tones of argon are produced.
  7. Argon is mostly used in lighting industry and welding process.
  8. Argon is colorless and odorless.
  9. Argon is a nonflammable and nontoxic gas.
  10. E938 is argon code of European food additive (used in food packaging to extend the life of the content).
  11. American Declaration of Independence and American Constitution are stored in cases fulfilled with argon gas.
  12. Energy efficient windows use argon for thermal insulation between the glass layers.
  13. Argon has 22 known isotopes; Ar-39 is used to determine the age of ice, ground water, and igneous rocks.

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