Chemistry
Chemistry, 19.09.2019 02:50, surfergirlmymy

Which element has the same number of valence electrons as hydrogen (h)? a. helium (he). b. oxygen (o). c. nitrogen (n). d. lithium (li).

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Chemistry, 06.07.2019 17:00, allisonchorath6971
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Chemistry, 30.07.2019 01:00, christianskyy7074
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