MCQ
The first ionisation potential is maximum for
  • A
    $B$
  • $N$
  • C
    $O$
  • D
    $Be$

Answer

Correct option: B.
$N$
b
(b) Ionisation potential generally increases when we more in a period from left to right but $I{E_1}$ of ${N_2}$ is greater than that of ${O_2}$.

It is due to the more stable (half-filled orbitals) configurations of $N$.

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