Key Notes ■Atomic Orbitals ■Covalent Bonds ■Sigma bonds Hybridization:Sp3 Sp2 Sp ■Aromatic rings ■Conjugated systems ■Carbonyl groups ■Nitrile Groups ■ReactivityCollege Key Notes of Science „Atomic Orbitals „Covalent Bonds „Sigma bonds „Hybridization: Sp3 , Sp2 , Sp1 „Aromatic rings „Conjugated systems „Carbonyl groups „Nitrile Groups „Reactivity