The Plumb Pudding Model

Atoms are so tiny that how far we can zoom in on them is limited by our camera capabilities. A typical width of an atom is something like 10 to the minus 10 meters, or around 10 nanometers or so. This makes it impossible for us to use visible light to produce anything resembling an image of an atom. To figure out whether atoms really look like Plumb Pudding, physicists would want to take something of a picture of one.