Magnesium has 12 protons, so if there are only 10 electrons, then it will have a +2 charge.
The charge on a magnesium ion with 10 electrons (Mg2+) is +2.
The electrical charge is 3-.
Magnesium
10
+1
The charge on a magnesium ion with 10 electrons (Mg2+) is +2.
Magnesium as an atom has two valance electrons. To complete it's octet, it must lose two electrons. Losing two electrons will make Mg have 12 protons and 10 electrons therefore having a +2 charge.
Magnesium, with a +2 charge.
The Magnesium atom will lose 2 of its electrons to become a Magnesium ion with 10 electrons. (Mg2+) How many electrons does a magnesium ion have? How many electrons does a fluoride ion have? How many electrons does a fluoride ion have?
The number of electrons are required to predict the charge of the ion.
The electrical charge is 3-.
A sodium atom has 11 electrons so the total charge of all the electrons in a sodium ion is -10.
The atomic number of magnesium is 12. The cation loses two electrons for 10.
12 + 10 = 22 charge
12 + 10 = 22 charge
Magnesium
Because it has 12 protons and 12 electrons, to gain a full outer shell via ionic bonding the ion looses 2 electrons (-ve) to gain a full outer shell (2,8). Therefore, the ion would have 12 protons (+ve) and only 10 electrons (-ve) making it have a +2 charge.