which of the following elements has the highest value of second ionization energy?

Options

A. `1s^(2)2s^(2)2p^(6)3s^(2)`
B. `1s^(2)2s^(2)2p^(6)3s^(1)`
C. `1s^(2)2s^(2)2p^(6)3s^(2)`
D. `1s^(2)2p^(6)3s^(2)3p^(3)`

Answer

B

Explanation

After losing one electron,the atom will get a stable configuration and its second ionisation energy will be very high,Hence,option (b)Is correct.