Chemistry - CHEMICAL BONDING Question with Solution | TestHub

To find x, consider N(SiH₃)₃. The central N atom is sp² hybridized, forming a trigonal planar geometry with three Si atoms. Each SiH₃ group has a tetrahedral Si. The maximum number of atoms in one plane is 7 (N and 3 Si atoms, plus 3 H atoms from one SiH₃ group). So, $x=7$.

For y, consider BrF₅. The central Br atom is sp³d² hybridized, leading to a square pyramidal geometry. The maximum number of atoms in one plane is 4 (Br and 3 F atoms). So, $y=4$.

The difference is $x-y=7-4=3$.