Question
Which elements are not main-group elements?(a) $\mathrm{AI}$(b) $\mathrm{Br}$(c) $\mathrm{Mo}$(d) $\mathrm{Cs}$(e) $\mathrm{Pb}$
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Main group elements are those found in groups 1A through 8A, essentially those that are on the far left and far right of the periodic table. Show more…
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