Applications of the all inrrt gases
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Helium is much less dense (lighter) than air and is used in balloons and blimps.
Neon is also used to make high-voltage indicators and switching gear, lightning arresters, diving equipment and lasers.
Argon is used to form inert atmospheres for arc welding.
Krypton is used in some types of photographic flashes used in high speed photography.
Xenon is used in photographic flashes, in high pressure arc lamps for motion picture projection.
Radon was used in some hospitals to treat tumours by sealing the gas in minute tubes, and implanting these into the tumour, treating the disease in situ.
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