• 3. Subtract the no. of e-’s calculated in step 1 from the no. in step 2. This gives you the no. of e-’s that must be shared to get an octet around all atoms in the molecule. • 4. no. of e-’s that must be shared /2 gives you the no. of bonds. • 5. subtract the no. of e-’s that are shared (from step 3) from the total no. of valence e-’s. This gives you the no. of unshared e-’s. • If you divide the no. of unshared e-’s by 2 you get the no. of lone pairs.