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28 November, 15:22

What do the elements in each pair have in common? k, kr be, mg ni, tc b, ge al, pb?

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  1. 28 November, 15:49
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    The pairs are:

    K, Kr - Same period

    Be, Mg - Same group

    Ni, Tc - Both are transition metals

    B, Ge - Both are metaloids

    Al, Pb - Both form inert oxides
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