It is now believed that protons and neutrons which

Last updated: 6/11/2023

It is now believed that protons and neutrons which constitute nuclei of ordinary matter are themselves built out of more elementary units called quarks A proton and a neutron consist of three quarks each Two types of quarks the so called up quark denoted by u of charge 2 3 e and the down quark denoted by d of charge 1 3 e together with electrons build up ordinary matter Quarks of other types have also been found which give rise to different unusual varieties of matter Suggest a possible quark composition of a proton and neutron