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Noble Gases

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Ne, Ar, Xe, Rn, Kr
   are all   
Noble Gases
Heaven Never Asked Kriegspiel's Extra Rent
   is a mnemonic for the   
Noble Gases
Helium, neon, argon, krypton, xenon, radon
Noble Gases
Elements With Zero Valency
They form group 0 in the periodic table and are non-reactive.

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