• A hybrid orbital results from the mixing of different types of atomic orbitals on the same atom.
• Explanation of the formation of sp3, sp2 and sp hybrid orbitals in methane, ethene and ethyne.
• Identification and explanation of the relationships between Lewis (electron dot) structures, electron domains, molecular geometries and types of hybridization.
• Students need only consider species with sp3, sp2 and sp hybridization.