Biology
Biology, 18.08.2021 01:00, broyochey1

MN Which element has four valence electrons?
(1 point)
O beryllium (Be)
O potassium (K)
O sulfur (S)
O silicon (Si)

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MN Which element has four valence electrons?
(1 point)
O beryllium (Be)
O potassi...

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