Answer:
The answer is 2 units positive and 2 units negative.
Step-by-step explanation:
An atom contain 9 protons and 9 electrons at the start,now if the atom loses 2 electrons the net charge of the atom will be 2 unit positive.
Let us assume that the atom is X now if 2 electrons are liberated by that atom then the atom will contain 2 unit positive charge that means X2+
Now if it gains 4 electrons then the X2+ ion will be converted to X2- ion.