A antiparticle known as the antineutrino is created to correspond to each neutrino (an elementary particle which is electrically neutral ) . The antineutron has a half integer spin but doesn’t have an electric charge. These are given off by the neutrino and have the opposite chirality as well as portraying leptons numbers of the opposite signs. Although neutrino’s are elementary particles they have a smaller mass than what a particle should be. So sorry this is under 100 (no where near 300) but I guess it could start you off and adding in a few extra words would add to the total of 71? Words

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