1. Tips for drawing Lewis structures
Look at bonding capacity!
Carbon will want to form 4 bonds
Nitrogen will want to form 3 bonds
Oxygen will want to form 2 bonds
Halogens will form 1 bond
Hydrogen will form 1 bond
All of the above apply to elements in the same column as they have same # of V.E.
Central atom
Choose the one with the highest bonding capacity (the one that will want to form the most bonds).
If Carbon is in the formula, try making it the central atom! Why? It has a large bonding capacity, 4 bonds.
When drawing Lewis structure:
Make sure each atom has the correct # of V.E. around it. (only when a substances are neutral)

3. Extra practice- Organic chemistry! *challenging
Ethane (C2H6)
Ethylene (C2H4)
Acetylene (C2H2)
Methanol (CH3OH)
Ethanol (C2H5OH)
Propanol (C3H7OH)

4. Extra practice- Formal Charges!
Determine the formal charges for each atom on the following structures: