Question

Which ion was formed by providing the second ionization energy to remove an electron?

Ca2+
N3–
Fe3+
S2–

Answer 1

If we remove 2 electrons, the new charge will be positive by 2 units. Hence, the ion is Ca2+.

Answer 2

If we remove 2 electrons, the new charge will be positive by 2 units. Hence, the ion is
`Ca^(2+)`.