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[mass noun] The chemical element of atomic number 18, an inert gaseous element of the noble gas group. Argon is the commonest noble gas, making up nearly one per cent of the earth's atmosphere.
- ‘Ramsay realized that argon and helium might be members of a hitherto unsuspected new group in the Periodic Table.’
- ‘It is the sixth most abundant gas in the atmosphere after nitrogen, oxygen, argon, carbon dioxide, and neon.’
- ‘Argon dating requires all sorts of assumptions about starting amounts of argon, rates of change and limits on outside factors.’
- ‘It combines easily and even explosively with every other element except helium, neon, and argon.’
- ‘There is surprisingly little oxidation of the image, and the institute will be keeping it in a box filled with inert argon gas.’
- ‘This makes carbon dioxide the fourth most abundant gas in the atmosphere after nitrogen, oxygen, and argon.’
- ‘Initially, I guessed and told her they might package the salad in an inert or nonoxygen atmosphere of nitrogen or maybe argon.’
- ‘Port-wine stains and other vascular lesions are commonly treated by argon, copper vapor or pulsed dye laser.’
- ‘Most readers know that gas divers tend to use an Argon suit inflation system to combat the heat loss due to helium and there is no reason why argon shouldn't be used during cold water diving.’
- ‘The interior of the bulb is filled with a gas, such as argon or nitrogen.’
- ‘In the second experiment, the team sent the benzene beam through a velocity selector and into a chamber of neon or argon gas.’
- ‘Rayleigh is perhaps most famous for his discovery the inert gas argon in 1895, work which earned him a Nobel Prize in 1904.’
- ‘In fact, argon is the third most prevalent gas in the atmosphere, making up nearly 1% of it.’
- ‘The atmosphere of the earth, we now know, contains far more oxygen or far less argon (whichever way one likes to put it) than does Mars.’
- ‘Gas lasers use gases such as argon, carbon dioxide, neon, and nitrogen.’
- ‘As the potassium decays into another element, argon, over incredibly long timespans, dates could be established.’
- ‘By surrounding hot metals with inert argon, the metals are protected from potential oxidation by oxygen in the air.’
- ‘Additions of oxygen, carbon dioxide, or nitrogen to argon gas will usually cause porosity or erosion of the electrode.’
- ‘Other gasses - such as argon and krypton - can be used in the space between the glass panes instead of air.’
- ‘The solvents were evaporated under reduced argon atmosphere, until a thin film formed.’
Late 19th century: from Greek, neuter of argos idle, from a- without + ergon work.
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