inert gas with 4 shells
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Noble gases
4 Krypton (Kr) 36
4 Krypton (Kr) 365 Xenon (Xe) 54
4 Krypton (Kr) 365 Xenon (Xe) 546 Radon (Rn) 86
4 Krypton (Kr) 365 Xenon (Xe) 546 Radon (Rn) 867 Oganesson (Og) 118
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