Match the following: List - I List - II (P) Same number of unpaired electrons are present in (excluding zero) (1) Na + , Mg 2 + , F − (Q) Same number of electrons in s & p subshells. (2) F − , M g , O

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Match the following: List - I List - II (P) Same number of unpaired electrons are present in (excluding zero) (1) Na + , Mg 2 + , F − (Q) Same number of electrons in s & p subshells. (2) F − , M g , O 2 − (R) Same number of electrons with the ℓ = 1 (3) Mg , Ne , O 2 − (S) Same number of total electrons (4) Li, Na, K (5) F, Cl, Br

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(P) → 4, 5: Li, Na, K (Group 1) and F, Cl, Br (Group 17) each possess exactly 1 unpaired electron in their outermost shell. (Q) → 1: Na⁺, Mg²⁺, F⁻ are isoelectronic with Neon ( 1 s 2 2 s 2 2 p 6 ), so they all share an identical count of 4 s-electrons and 6 p-electrons. (R) → 1, 2, 3: All species in sets 1, 2, and 3 contain exactly 6 electrons with ℓ = 1 (p-electrons) in their 2 p subshell. (S) → 1: Na⁺, Mg²⁺, and F⁻ are all isoelectronic species containing a total of 10 electrons each.

List - I	List - II
(P) Same number of unpaired electrons are present in (excluding zero)	(1) $Na^{+}, Mg^{2 +}, F^{-}$
(Q) Same number of electrons in s & p subshells.	(2) $F^{-}, M g, O^{2 -}$
(R) Same number of electrons with the $ℓ = 1$	(3) $Mg, Ne, O^{2 -}$
(S) Same number of total electrons	(4) Li, Na, K
	(5) F, Cl, Br

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