One thing that is really confusing me is Beta Particles. This site states that Beta Particles are electrons that are shot out of the nucleus (atomic core) of an atom. http://home.clara.net/darvill/nucrad/morebeta.htm To rationalize this claim it states that a neutron will decay to a proton and an electron. And that the electron gets shot out of the nucleus. This doesn't make much sense to me. Protons are 2 up quarks and a down quark and Neutrons are 2 down quarks and an up quark. When a neutron decays to a proton one of the down quarks changes to an up quark. Does this process release an electron? Or is the site wrong? Thanks!