A subatomic particle has a physical size of zero (the "size" of a particle is essentially the range of the forces it participates in, but the spatial size is zero), so depending on how you measure it (i.e. which forces) you can get an area that really is infinite.
A subatomic particle has a physical size of zero (the "size" of a particle is essentially the range of the forces it participates in, but the spatial size is zero), so depending on how you measure it (i.e. which forces) you can get an area that really is infinite.