These are group 18 elements with fully filled outermost shell(Valence shell).
Properties:
1. Highly Stable
2.Chemically Unreactive
Properties:
1. Highly Stable
2.Chemically Unreactive
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Noble Gas Name
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Atomic No.
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Uses
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Helium(He)
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2
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1.Used for diluting pure oxygen in deep sea diver gas tanks.
2.inflate tyres of large Aircraft.
3.Weather balloons
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Neon(Ne)
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10
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Used in Sign tubing
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Argon(Ar)
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18
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Arc Welding, Common light bulbs
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Krypton(Kr)
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36
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Photographic flash units, light houses
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Xenon(Xe)
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54
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Photographic flash units, light houses.
It is also known as Stranger Gas)
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