From previous lessons, I know that column 1 are alkali metals, column 2 are alkaline earth metals, column 3 till column 12 are transition metals, column 17 are halogens and column 18 are inert gases. But till now I don't know the properties of elements in columns 13, 14, 15 and 16... Are they metals or non-metals? I have not faced such a question before.
closed as unclear what you're asking by M.A.R., Todd Minehardt, bon, Jan, Loong♦ Nov 1 '15 at 18:47
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