potassium and sulfur - K2S Ionic Bond calcium and chlorine - CaCl2 Ionic Bond hydrogen and bromine - HBr Covalent Bond nitrogen and nitrogen - N2 Covalent Bond zinc and zinc - No bond Solution potassium and sulfur - K2S Ionic Bond calcium and chlorine - CaCl2 Ionic Bond hydrogen and bromine - HBr Covalent Bond nitrogen and nitrogen - N2 Covalent Bond zinc and zinc - No bond.