argonn.
/ˈɑːɡɒn/, /ˈɑːɡ(ə)n/, U.S. /ˈɑrˌɡɑn/ Chemistry.
A colourless odourless gas occurring in very small quantity (less than 1 per cent.) in the air, used in ‘gas-filled’ electric light bulbs, etc. Discovered in 1894 and named from its chemical inertness. Symbol Ar, atomic number 18, atomic weight 39·944.
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argon1894
A1896
Ar1908
1894 Daily News 28 Dec. 3/2.
1895 Ld. Rayleigh & W. Ramsay in Philos. Trans. (Royal Soc.) A. 186 187 Argon, a New Constituent of the Atmosphere.
1895 Ld. Rayleigh & W. Ramsay in Philos. Trans. (Royal Soc.) A. 186 234 The gas deserves the name ‘argon’, for it is a most astonishingly indifferent body, inasmuch as it is unattacked by elements of very opposite character.
1913 A. G. Bloxam & S. J. Lewis Bloxam's Chem. (ed. 10) 293.
1958 Engineering 7 Feb. 187/1 It is necessary to melt titanium either in the presence of a suitable inert gas, such as argon, or else in a vacuum.
This entry has not yet been fully updated (first published 1933; most recently modified version published online December 2021).
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n.1894