JEE Main Chemistry question

The ionization energy of nitrogen is more than that of oxygen because

(A)The nucleus has more attraction for electrons
(B)Half-filled -orbitals are more stableCorrect
(C)The nitrogen atom is small
(D)Of a greater penetration effect

Answer: (B)

Solution

Nitrogen's configuration () is exactly half-filled, which gives it extra stability due to symmetrical electron distribution and favourable exchange energy, making it harder to remove an electron from nitrogen than the simple periodic trend

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Question ID VK-133520