Chemistry, 02.12.2020 21:30 ghari112345

Which one of these elements is the lightest: 1- oxygen , 2- carbon , 3- nitrogen , 4- neon. idk what neon is but that’s an answer so...

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Which one of these elements is the lightest: 1- oxygen , 2- carbon , 3- nitrogen , 4- neon. idk wha...