Quark particles.
Protons and neutrons make up the nucleus in an atom, the electrons are in shells or orbits around that nucleus at quite a distance (relatively to the nucleus diameter). Edit. Share to: 1  The Periodic Table of Elements Life is sustained by a number of chemical elements. Protons and neutrons make up the nucleus of an atom. Protons have a positive charge, neutrons have a neutral charge. Unlike the electron, hadrons are not fundamental-they are made up of even smaller particles called quarks. Hunting the quark. The nucleus of an atom normally contains two types of particle: the proton and the neutron. From what you have learned before, it may seem that protons and neutrons are fundamental particles. This would be a nice simple picture of matter: three particles that make up the Universe-protons, neutrons and electrons. However, protons and neutrons are only two particles in a large family called hadrons. A proton is made from two up quarks and a down quark. A neutron is made from two down quarks and an up quark. Table 1 shows the properties of these quarks and how they combine to give the charges of protons and neutrons. You can read more about quarks in the extension page. Along with protons, neutrons make up the nucleus, held together by the strong force. The neutron is a baryon and is considered to be composed of two down quarks and one up quark. A free neutron will decay with a half-life of about 10.3 minutes but it is stable if combined into a nucleus. When we say that a proton is made up of two up quarks and a down, we mean that its net appearance or net set of quantum numbers match that picture. Protons are made of other particles called quarks. There are three quarks in each proton — two up quarks and one down quark — and they are held together by other particles called gluons. Neutrons. Neutrons are uncharged particles found within atomic nuclei. A neutron's mass is slightly larger than that of a proton. Like protons, neutrons are also made of quarks — one up quark and two down quarks. A particular atom will have the same number of protons and electrons and most atoms have at least as many neutrons as protons. Protons and neutrons are both composed of other particles called quarks and gluons. Protons contain two 'up' quarks and one 'down' quark while neutrons contain one 'up' quark and two 'down' quarks. The gluons are responsible for binding the quarks to one another.  Proton. Along with neutrons, protons make up the nucleus, held together by the strong force. The proton is a baryon and is considered to be composed of two up quarks and one down quark. It has long been considered to be a stable particle, but recent developments of grand unification models have suggested that it might decay with a half-life of about 10 32 years. When we say that a proton is made up of two up quarks and a down, we mean that its net appearance or net set of quantum numbers match that picture. UCCS Energy Science II ENSC 1510 Spring 2012 Test 3 name: ______________________________ 1. The particles that make up neutrons and protons are called: a. electrons b. positrons c. quarks d. strings 2. The antiparticle for the electron is the: a. neutron b. positron c. proton d. quark 3. The strong interaction force is responsible for holding protons and neutrons together in the nucleus. a.  The proton is a subatomic particle, symbol p or p+ , with a positive electric charge of +1e elementary charge and mass slightly less than that of a neutron. Protons and neutrons, each with mass approximately one atomic mass unit, are collectively referred to as  nucleons . Two terms are used in referring to the mass of the quarks that make up protons: current quark mass refers to the mass of a quark by itself, while constituent quark mass refers to the current quark mass plus the mass of the gluon particle field surrounding the quark. These masses typically have very different values. A quark is a tiny particle which makes up protons and neutrons. Atoms are made of neutrons, protons, and electrons. After the invention of the particle accelerator, it was discovered that electrons are fundamental particles, but neutrons and protons are not. Neutrons and protons are made up of quarks, which are held together by gluons.
http://www.answers.com/Q/What_are_the_sub-atomic_particles_that_make_up_protons_and_neutrons http://resources.schoolscience.co.uk/stfc/14-16/particles/particlesmodel2.html http://hyperphysics.phy-astr.gsu.edu/hbase/particles/proton.html http://www.livescience.com/37206-atom-definition.html http://education.jlab.org/qa/atom.html http://hyperphysics.phy-astr.gsu.edu/hbase/particles/proton.html http://www.uccs.edu/~rtirado/ENSC_1510_Test3_MC.pdf https://en.wikipedia.org/wiki/Proton https://simple.wikipedia.org/wiki/Quark
what particles make up a proton