Question

which among the following has same number of electron
1)N^-3 and Mg^+
2)Na^+ and O^-
3)O^-2 and S^-2
4)H^+ and H^-​

Answer 1

Explanation:

Once check your question you have written the charges of 1st and 2nd option wrong

Mg charge = +2 and o charge = - 2

If what I have said is correct then 1st and 2nd options are iso electronic if not no options are correct

Answer 2

Answer:

2)Na^+ and O^-