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+
The answer is double displacement is the answer
Hi Sara
I would say it is an amorphous solid.
Because it's gradually loses shape.
I hope that's help:)
The answer would be Rocks, metals, hydrogen compounds, hydrogen and helium, all in gaseous form.