Which of the following is arranged in order of increasing second ionisation energy?

Question

Which of the following is arranged in order of increasing second ionisation energy? (A) C < N < O < F  (B) F < C < N < O (C) C < N < F < O (D) F < O < N < C

Tardigrade Admin · Accepted Answer

Ionisation energy increases from left to right in a period. But oxygen after removal of first electron gets stable half-filled electronic configuration (2s22p3) and thus its second ionisation energy is higher than that of fluorine. Thus, order of 2nd ionisation energy is C < N < F < O.

Q. Which of the following is arranged in order of increasing second ionisation energy?

$C < N < O < F$

$F < C < N < O$

$C < N < F < O$

$F < O < N < C$

Q. Which of the following is arranged in order of increasing second ionisation energy?

C<N<O<F

F<C<N<O

C<N<F<O

F<O<N<C

Ionisation energy increases from left to right in a period. But oxygen after removal of first electron gets stable half-filled electronic configuration (2s22p3) and thus its second ionisation energy is higher than that of fluorine. Thus, order of 2nd ionisation energy is C<N<F<O.

$C < N < O < F$

$F < C < N < O$

$C < N < F < O$

$F < O < N < C$