Argon!
Argon Ar 18
ATOMIC MASS 39.95
STATE Gas
DISCOVERY 1894 (Lord Rayleigh and Sir William Ramsay)
Argon is the third most abundant gas in the atmosphere, after nitrogen and oxygen.
About 1 per cent of Earth’s atmosphere is made up of argon, the most common noble gas on Earth.
Argon was named after the Greek word Argos, meaning “idle”; because early chemists were left with it after removing all other gases from air, and they found it did not do anything at all.
Pure argon in a glass sphere: This sample of argon is trapped in a glass sphere, and gives off a pale purple colour when electrified.
Argon-filled suit: Some diving suits are inflated with argon to retain heat in cold water.
Metal welding: Argon in this flame prevents metals from reacting with oxygen during hot welding.
WINDOWS: Argon is a poor conductor of heat and is used to fill the gaps between panes in double-glazed windows.
Double-glazed window: The space between the glass panes is filled with argon to slow the loss of heat.
BULBS: Argon is often used as the inert gas in filament light bulbs it’s also found in newer low-energy bulbs.
PRESERVATION: Argon is used in museum displays to protect delicate exhibits. Historical documents are stored in sealed containers filled with argon to stop degradation by oxygen.
Argon-filled display: The Magna Carta, a historical document, is stored in argon, which forces out oxygen and water vapour that would damage the parchment.
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