An element A occupies group number 17 and period number 2, is the most electronegative element. Element A reacts with another element B, Which occupies group number 17 and period number 4, to give a compound C. CompoundC undergoes `sp^3 d^2` hybridisation and has octahedral structure. Identify the elements A and B and the compound C. Write the reactions.

Explanation

(i) The element of group number 17 and period number 2 is fluorine (A).
(ii) The element of group number 17 and period number 4 is bromine (B).
(iii) (A) and (B) react to give an interhalogen compound (C) bromine penta fluoride.
`underset((A)) (Br_(2))+underset((B))(5F_(2)) rarr underset((C))(2BrF_(5))`
(C) undergoes `sp^(3)p^(2)` hybridisation and has octahedral structure.