Quarks and Leptons!

     Quarks are the building blocks of protons, and neutrons, but not electrons. There are six kinds of quarks. There names are: up, down, strange, charm, bottom, and top. They are in order from lightest to heaviest in weight. All quarks have antiquarks. They are opposites of quarks. Quarks have positive charges, while antiquarks have negative charges. There is also another type of matter that makes up atoms. They are called leptons. Leptons are similar to quarks. Although some leptons are larger than quarks, and some are smaller. The most well known lepton is the electron. The other types of leptons are tau, muon, and neutrinos. Tau and muon leptons have some electrical charge, and are heavier than electrons. Neutrinos have very little charge, and very little mass. They are very difficult to find. Neutrinos are so stable, that when they pass through the atompsphere, they don't react with anything.