Mg2+...because it loses 2 electron which is on its valence shell making it empty and making it have jst 2 shells. The radius calculated from d nucleus to the new valence shell is then smaller than that of Cl^- and k+
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Those are the answers to an unknown question???
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yes, if they were in rest they would have potential energy
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Its B i believe, Storms and currents can bring in sediments from other places