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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