(11) What is the hybridization of the central N atom in NO₂? N and O are in groups 5 and 6 and their atomic numbers are 7 and 8. (12) What is the hybridization of the central I atom in IF? I and F are both in group 7 and their atomic numbers are 53 and 9. (13) What is the hybridization of the central Xe atom in XeO3? Xe and O are in groups 8 and 6 and their atomic numbers are 54 and 8.

A molecule with the formula AB3 could have one of four different shapes. Give the shape and the hybridization of the central A atom for each.

The structure of amphetamine, a stimulant, is shown below. (Replacing one H atom on the NH2, or amino, group with CH3 gives methamphetamine a particularly dangerous drug commonly known as speed.) (a) What are the hybrid orbitals used by the C atoms of the C6 ring. by the C atoms of the side chain, and by the N atom? (b) Give approximate values for the bond angles A, B, and C. (c) How many bonds and bonds are in the molerule? (d) Is the molecule polar or nonpolar? (e) Amphetamine reacts readily with a proton (H+) in aqueous solution. Where does this proton attach to the molecule? Explain how the electrostatic potential map predicts this site of protonation.

What hybrid orbitals would be expected for the central atom in each of the following molecules or ions?