An Aluminum ion, Al3+ has:? How many protons & Electrons ? How would you figure that?

I know the answer is 13 protons 10 electronsWhy would it be 10 electrons ,doesn't proton electrons ?how did they get 10?

The Aluminium “atom” has the atomic number equal to 13, which means it has 13 electrons and 13 protonsThe net negative charge due to electrons is equal to the net positive charge due to protons, thereby making the Al atom neutralBut the Al3+, i.e., aluminium cation, has 3 positive charge which it attains after losing 3 electrons (protons are not lost, there remain in the nucleus of the atom)The formation of ions means that the neutrality of the atom is lost, so the number of electrons and protons can’t remain equalThe noof electrons in Al3+ 13 - 3 10 The noof protons in Al3+ 13