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Biology, 08.04.2021 22:50 brayden5418

Select the elements that have 4 valence electrons. hydrogen (H)
krypton (Kr)
strontium (Sr)
carbon (C)
oxygen (O)
tin (Sn)

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Select the elements that have 4 valence electrons. hydrogen (H)
krypton (Kr)
strontium...
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