Question

Consider the elements n, p, o and s and arrange them in order of (a) increasing first ionization enthalpy. (b) increasing negative electron gain enthalpy. (c) increasing non-metallic character.

Answer 1

Explanation:

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Answer 2

Answer:

N has higher ionisation enthalpy than O due to extra stability of half-filled orbitals. Similarly, P has higher ionisation enthalpy than S due to half-filled orbitals. Non-metallic character decreases down the group and increases from left to right in a period.