What is the charge on the ion typically formed by each element?

Question

a. oxygen
b.iodine
c.sodium
d. aluminum
e. nickel, 2 eletrons lost
f. magnesium

Answer 1

a) [O 2-]
b) [ I - ]
c) [Na+]
d) [Al 3+]
e) [Ni 2+]
f) [Mg 2+]

Answer 2

Look at the Group Number in the Periodic Table.
If it's a metal, it's that Group Number followed by a +.
If it's a non-metal, it's 8 minus the Group Number, followed by a -.
You're told that nickel loses two electrons, so that's 2+. Off you go!