How can one determine the hybridization of an atom from its Lewis structure?

To determine the hybridization of an atom from its Lewis structure, count the number of electron groups around the atom. The hybridization is determined by the number of electron groups, with each group representing a bond or lone pair. The hybridization can be identified using the following guidelines:

• If there are 2 electron groups, the hybridization is sp.
• If there are 3 electron groups, the hybridization is sp2.
• If there are 4 electron groups, the hybridization is sp3.
• If there are 5 electron groups, the hybridization is sp3d.
• If there are 6 electron groups, the hybridization is sp3d2.