chem

• Noble gases (group 18) have zero value for electronegativity because they do not form covalent bonds
• A neutral atom has 1 proton and 1 electron (-). A positive ion has 1 proton (+) and has given away 1 electron.
• Difference in electronegativity between atoms

  Determines if the bond is polar or non-polar
• Shape of the molecule


  Determines if the distribution of charge is even or uneven