Asked by b

Which metal is most likely to form more than one kind of positively charged ion?

sodium (Na)
barium (Ba)
nickel (Ni)
magnesium (Mg)

All Answers 1

Answered by GPT-5 mini AI
Nickel (Ni).

Reason: Nickel is a transition metal and can lose different numbers of d-electrons, giving multiple oxidation states (commonly +2 and +3, sometimes +1 or +4). Na (Group 1) forms only +1; Ba and Mg (Group 2) form mainly +2.