Lewis Structures in Ionic and Covalent Bonding

1. Make the compounds listed in the data table.
2. Use different color m&m for the valence electrons of each atomfor each
atom.
3. Subtract electronegativity (nonmetal minus nonmetal). If the difference
is 1.7 or more, electron(s) are transferred. Move the metal electrons
onto the card of the nonmetal atom. Satisfy the octet rule (or 2 for
hydrogen). If the difference is less than 1.7 then the bond is covalent
and you should share the electrons between the nonmetals making a
molecule. Remove one m&m from each atom and replace with a
pretzel. Use multiple bonds until octet rule is satisfied.



Name Formula Lewis Structure

Sodium Chloride NaCl


Methane CH4

Barium Hydroxide BaOH


Acetic Acid C2H4O2


Water H2O


Carbon Dioxide CO2


Chlorine Cl2


Ammonia NH3


Fluoro-Methane CH3F


Peroxide H2O2