As an insulating gas (eg in double glazing).
Nowhere in everyday life
You use helium in balloons. Neon and argon in lights. Argon is used as an "inert" gas to inhibit bacterial growth.
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Argon is found in the air! Argon is present if the Earth's atmosphere at 0.94%
used as filling for fluorescent lamps, electric light bulbs, incandescent lamps and for vacuum tube.
There are countless places that sound energy be found in everyday life. For example, in any set of computer speakers.
The limacon can be found in the pattern of a snail's shell.
Yes there is argon in the air in the atmosphere
Argon is found in trace amounts in the atmosphere. It is found as a mixture along with other noble gases.
Argon was found in Scotland in 1894 by Lord Rayleigh and Sir William Ramsay.
No, argon is not essential for life. It is used in industrial applications but not essential to biology.