Homework due 9/2/2010

Matter: Matter is a group of fundamental building blocks joined together in different ways (mostly made of protons and neutrons).

Antimatter (antiparticles):  Antimatter looks and behaves very similar to matter counterparts, but contains opposite particle charges.  For every piece of matter, there is an equal amount of antimatter.

Quark:  Quarks are some of the particles that make up atoms.  They are the smallest fundamental building block of atoms that scientists have been able to find so far. They shake within the protons and neutrons of an atom. Also, they have a fractional electric charge and a “color” charge.

Hadrons:  Hadrons are combined particles made of quarks.  The quarks combine to give the hadrons integer charges, instead of fractional ones like quarks.  Also, they have no color charge even though the quarks that make them up do.

Baryons: A baryon is a hadron made up of three quarks. Baryons are made of “up” and “down” quarks.  Protons and neutrons are typical examples of baryons.

Leptons: Leptons are the other types of matter particles; there are six types to be exact (three have an electrical charge, three do not).  They do not have internal structures.  The most commonly known lepton is the electron; muon’s and tao’s are also leptons.  The other three leptons are neutrinos.  Leptons don’t interact with other particles very much, unlike quarks.  When leptons decay, the energy of the muons, taos, and electrons is conserved.

Neutrinos:  Neutrinos are the three types of leptons that have no charge, a tiny mass, and are very difficult to pinpoint.  Each type of neutrino has a single charged lepton that it stays close to.  They are most likely formed when particles decay.

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