Calculate the net charge on a magnesium ion which has lost two electrons.
2. The attempt at a solution
I put 2+ as my answer and this is what I was told, but I don't understand what they mean by the following;
That's a chemist's shorthand, not the amount of charge on the ion.
You did not give the correct unit.
Does the magnesium ion gain or lose charge when it loses electrons?
Be careful with the number of electrons lost!
The question asks for the charge, which should be given in SI units.