Question

Magnisium atom is electrically neutral but magnesium ion is electrically charged, why?

Answer 1

Atoms are electrically neutral because they have equal numbers of protons (positively charged) and electrons (negatively charged). If an atom gains or loses one or more electrons, it becomes an ion. ... If, on the other hand, it loses one or more electrons, it now carries a net positive charge and is "cationic."