Column-I (Electronic configuration of element in ground state) Column-II (Characteristics) (A) 1 s 2 (P) Highest ionisation energy (B) [ Ne ] 3 s 2 3 p 5 (Q) Highest electron gain enthalpy (only magni

Question

Column-I (Electronic configuration of element in ground state)	Column-II (Characteristics)
(A) $1 s^{2}$	(P) Highest ionisation energy
(B) $[Ne] 3 s^{2} 3 p^{5}$	(Q) Highest electron gain enthalpy (only magnitude)
(C) $[Kr] 5 s^{2} 4 d^{10} 5 p^{5}$	(R) Smallest anionic radius of element (stable uninegative)
(D ) $[He] 2 s^{2} 2 p^{5}$	(S) Largest anionic radius of element (uninegative)
	(T) Gas at room temperature

TestHub · Accepted Answer

(A) 1s² (He)
→ Noble gas → highest ionization energy (P), gas at room temp (T)

(B) [Ne] 3s²3p⁵ (Cl)
→ Halogen → highest electron affinity (Q), gas (T)

(C) [Kr] 5s²4d¹⁰5p⁵ (I)
→ Larger halogen → largest anionic radius (S)

(D) [He] 2s²2p⁵ (F)
→ Small halogen → smallest anion (R), gas (T)

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