•Write the skeletal structure and
 fill in with the info you came up with. After you’ve put in
 the # bonds calculated, fill in the octets.
•H (and F) form only one bond.
 Therefore they can only be terminal atoms in a structure.
 
 •So you can not
 have
 •         C---H---C
 •It has to be   H---C--C
 •