Question

Which is not a correct ion?
li2+
cl-
Al3
O2-

Answer 1

(a)
`Li^(2+)`

Step-by-step explanation:

Answer is (a)
`Li^(2+)`

As lithium has only one valence electron, it will lose one electron to form a cation with charge 1+ . Thus the correct Li ion is
`Li^(1+)`

Answer 2

The answer is option 1.

Step-by-step explanation:

Lithium is a Group 1 element. So the correct charge for lithium should be Li+.