What are protons and neutrons?
A proton makes up part of the nucleus of an atom. A proton has a positive charge, while a neutron has no charge (is neutral). Protons are made of 1 up quark and 2 down quarks. A quark is a subatomic particle that makes up protons and part of neutron. There are 6 different types(flavours) of quarks. They are up, down, charm, strange, top, and bottom. A neutron is either made of 2 up quarks and 1 down quark or a proton and a lepton (electron). The quarks in a neutron and proton are held together by gluons. The strong nuclear force holds an atom together while the weak nuclear force pulls it apart (also called radioactivity).
