What must happen to an atom of magnesium in order to become a magnesium ion mg+2?

Magnesium must lose two electrons to become

Explanation: Magnesium(Mg) ia a metal with atomic number of 12 and atomic mass of 24.

Atomic no = no of electrons = no of protons

Atomic Mass = no. of protons + no. of neutrons

Thus Magnesium in neutral form has got 12 electrons and 12 protons. In order to acquire a charge of +2 it must loose two electrons. Now the no of protons will be greater than no of electrons and thus the atom will acquire positive charge.

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