Is there anything smaller than a quark?

All we know about the size of quarks is that they are smaller than the resolution of any measuring instrument we have been able to use. In other words, they have never been shown to have any size at all. Most physicists suspect that they are not actually points, but we don't know how small they are. read more

All of the quarks are heavier than the electron. The top quark is hundreds of times heavier. Not all matter decomposes into quarks. Quarks underlie protons and neutrons (they're made up of up and down quarks, the lightest one), but electrons are a whole different part of the Standard Model. read more