Chemistry, 13.12.2021 14:00 austinhamy1
Which of the following sequences of elements with all have four valance electrons
B, si, as, te
C si, ge, sn
O s, se, te,
ga, ge, as, se
Answers: 2
Chemistry, 23.06.2019 02:00
Which best describes the present-day universe? opaque, expanding very slowly, stars produce heavy elements transparent, expanding at an accelerated rate, stars produce heavy elements opaque, expanding at an accelerated rate, stars produce only hydrogen and helium transparent, expanding very slowly, stars produce only hydrogen and helium
Answers: 1
Which of the following sequences of elements with all have four valance electrons
B, si, as, te
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