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  • Noble gases: helium, He; Neon, Ne; Argon, Ar; Krypton, Kr; Xenon, Xe; Radon, Rn and in some cases, oganesson, Og. Lewis dot diagrams of the elements of atoms. Puzzle #799262676
Noble gases: helium, He; Neon, Ne; Argon, Ar; Krypton, Kr; Xenon, Xe; Radon, Rn and in some cases, oganesson, Og. Lewis dot diagrams of the elements of atoms. puzzle #799262676

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