Answer:
Al⁺³ has 10 electrons.
Fe⁺³ has 23 electrons.
Mg⁺² has 10 electrons.
Sn⁺² has 48 electrons.
Co⁺² has 25 electrons.
Co⁺³ has 24 electrons.
Li⁺¹ has 2 electrons.
Cr⁺³ has 21 electrons.
Rb⁺¹ has 36 electrons.
Pt⁺² has 76 electrons.
Explanation:
To find the total number of electrons for an ion, you need to take the atomic number and subtract the charge of the ion from it, if the charge is positive.
For example, let's do Al⁺³. Aluminum has an atomic number of 13. The charge is +3. The total number of electrons is 10.
13 - 3 = 10
