A-Level CAIE Chemistry AS 3.4.1—Covalent bonding examples Question Bank

• Define covalent bonding as attraction between two nuclei and a shared electron pair.

- Describe covalent bonding in H2, O2, N2, Cl2, HCl, CO2, NH3, CH4, C2H6 and C2H4

- Period 3 expanded octets: SO2, PCl5 and SF6

- Coordinate bonding: NH3 + HCl -> NH4+ and Al2Cl6