Elements P, Q, R, S have 6, 11, 15, 17 electrons respectively, therefore,
- P will form an electrovalent bond with R
- Q will form a covalent bond with S
- R will form an electrovalent bond with S
-
Q will form an electrovalent bond with S
- Q will form a covalent bond with R
The correct answer is: D
Explanation
P [6] = 2, 4
Q [11] = 2, 8, 1
R [15] = 2, 8, 5
S [17] = 2, 8, 7
Given the above is the electronic arrangement of PQRS elements, Q will form an electrovalent bond with S
Further explanation was provided by our student by name (Odebiyi Dare D-cent) via our facebook page. Thus he says:
without argument, D is the answer cos electrovalent involves the transfer of electron. Already, Q is 11 with elect configuration of 2,8,1, i.e having 1 valency electron which is ready to be loss by that atom of element Q, also, S is 17, with electronic configuration, with 2,8,7. There the 7valence electron of S attracts that nly 1 electron to attain a stable octet structure.