General Science

  • noun an inert gas, which occurs in air and of which isotopes form in the cooling systems of reactors. It is used in electric light bulbs.


  • A noble gas which comprises approximately 0.93% of air by volume, and whose atomic number is 18. It has about 15 known isotopes, of which 3 are stable. It has various applications in electronics, including its use in specialized lamps, lasers, and in Geiger counters. Its chemical symbol is Ar.
  • chemical symbolAr
    (written as Argon)