Explain why the second ionization energy of K is greater than the 2nd ionization of C.?

Question

Based on the actual configurations of the elements, explain why the 2nd ionization energy of potassium is greater than the 2nd ionization energy of calcium

Answer 1

that is a very easy question
i will answer u fi fu dont mind

that is just because 2nd ionization energy of k involves a full fill sub level, while c dont.

so it needs a greater ionization energy than c

Answer 2

The 2nd ionization of K equals 3069 kJ/mol and it is greater than the 2nd ionization of Ca which equals 1146 kJ/mol.

That is because the cation K+ has 8 electrons in the M shell but the cation Ca has 1 electron in N shell