No, it is not possible to see a single molecule with the naked eye. Molecules are extremely small, with their sizes typically measured in nanometers (nm). A nanometer is one billionth of a meter, and most molecules are only a few nanometers in size. The smallest objects that can be seen with the naked eye are generally around 100 micrometers (µm) in size, which is about 100,000 times larger than a molecule. This means that, without the aid of a microscope, it is impossible to see an individual molecule.