* Polarity: A molecule is considered polar when it has a positive and a negative end due to an uneven distribution of electrons. This uneven distribution arises from differences in electronegativity between the atoms within the molecule.
* Non-polarity: A molecule is considered non-polar when there is an even distribution of electrons, resulting in no distinct positive or negative ends. This usually occurs when the molecule has identical atoms bonded together or when the polarities of individual bonds cancel each other out.
Therefore, a molecule can only be one or the other.
However, there are some cases where a molecule can have polar bonds but still be non-polar overall. This occurs when the individual polar bonds are arranged symmetrically, causing their polarities to cancel each other out. A classic example is carbon dioxide (CO2).
