Moo7ne1Peckychrison Moo7ne1Peckychrison

30-12-2015
Chemistry

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Which set of symbols represents atoms with valence electrons in the same electron shell?
(1) Ba, Br, Bi (3) O, S, Te(2) Sr, Sn, I (4) Mn, Hg, Cu

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30-12-2015

Answer=2

Sr,Sn, and I have their valance electrons in the same electron shell, we know this because they are in the same period (row) on the periodic table.

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