Electronic configuration of four elements l,q,p and r, Chemistry

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The electronic configuration of four elements L,Q, P, and R are given in brackets:

L ( 1s² , 2s², 2p⁴) Q (1s² , 2s², 2p⁶, 3s² ,3p⁵)
P ( 1s² , 2s² 2p⁶, 3s¹) R ( 2s² , 2s², 2p⁶, 3s²,)

The formulae of ionic compounds that can be formed between these elements are:

(1) L,P, RL, AND R₂ Q

(2) LP, RL, PQ, AND RQ

(3) P₂, RL, PO and RQ₂

(4) LP, R₂L, P₂ and RQ

Ans: P₂ , RL, PO and RQ₂

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