(a) Define the term 'isomers'. (b) Draw two possible isomers of the compounds with molecular formula C3H6O and write their names. (c) Give the electron dot structures of the above two compounds.

a. An isomer is a molecule with the same molecular formula as another molecule, but with a different chemical structure. That is, isomers contain the same number of atoms of each element but have different arrangements of their atoms.
b. Isomers with formula C3H6O:

1. Propanal, CH3CH2−CHO,
2. Propanone or acetone, CH3−CO−CH3
   c. The electron dot structures of the above two compounds are as shown in the figure.