Phase 5: Construction Administration. Finally, once you have selected a contractor and construction is under way, we move into the fifth phase of the architectural design process â construction administration.
The neutron is a subatomic particle, symbol n or n0 , with no net electric charge and a mass slightly larger than that of a proton. Protons and neutrons constitute the nuclei of atoms.
Quarks make up many different particles, so the hadrons are classified in two groups; those made from two quarks are called mesons, while particles made up from three quarks are called baryons. protons are made from two up quarks + one down quark; neutrons contain two down quarks + one up quark; so protons and neutrons are baryons.