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  • Values Of E M For Positive Particles
    315 words
    Mini-Research ELECTRON- In 1897, Sir J.J. Thomas, an English physicist, measured the deflection of cathode-ray particles in magnetic and electrical fields. As a result he found the ratio of the charge, e, to the mass, m, of the cathode-ray particles. He found e / m identical to those particles irrespective of the metal the electrodes were made of or the kind of gas in the tube. In 1909, RA Millikan, an American scientist, measured that charge. All electrons are found to be identical no matter th...
  • Properties And Interactions Of Quarks
    4,017 words
    The atom, although small in size and great in number, is one of the greatest enigmas in the science world today. Over 200 different subatomic particles have been found, and scientists are still looking for more. The most basic parts of the atom are the electron, the proton and the neutron. These three make up a small group of the know subatomic particles. Of these three only the electron is actually a fundamental particle. The proton and neutron are both hadrons composed of different smaller par...
  • Quarks With Charge 2 3 E
    3,747 words
    What exactly is Quark? Quark: a fermion which is believed to be one of the fundamental constituents of matter. All quarks have a fractional electric charge 1. This pretty much means quarks have 1/2 spin (rotate two full rotations to get to place it started), apply to Pauli Exclusion Principle, is one of the things that make up all matter, and its electric charge is a fraction. There are three different colors of quark; red, green, and blue. The colors always up to white. Also there are three dif...
  • Three Quarks And Neutrons
    1,274 words
    All particles can be classified into two broad categories: leptons and hadrons. The main difference between the two is whether they interact through the strong interaction. Hadrons are particles that interact through all four fundamental interactions of nature, which include, strong, electromagnetic, weak, and gravitational interactions. Hadrons, the strongly interacting particles, can be further subdivided into two classes based on their internal composition: mesons and baryons. Originally, mes...
  • Neutrino Mass
    460 words
    The first real evidence that neutrinos may posses tiny particles of mass where when a giant particle detector was located deep in a mind in Japan. Neutrinos carry no electric charge. This particle-detecting equipment is sensitive only to charted particles, scientists are not able to observe neutrinos directly. If a neutrinos collides with a proton or neutron, the particles in the nucleus of and atom, the neutrino is transformed into a charged particle. There are three kinds of neutrinos. Electro...
  • Charge Of The Electron
    528 words
    The Discovery Of The Electron The electron was discovered in 1895 by J.J. Thomson in the form of cathode rays, and was the first elementary particle to be identified. The electron is the lightest known particle which possesses an electric charge. Its rest mass is Me approximately equal 9.1 x 10 -28 g, about 1/1836 of the mass of the proton or neutron. The charge of the electron is -e = -4.8 x 10^-10 esu elec trostaticunit). The sign of the electron's charge is negative by convention, and that of...
  • Atom And Its Particles
    396 words
    It has been said that during the 20th century, man harnessed the "power of the atom". We made atomic bombs and generated electricity by nuclear power. We even split the atom into smaller pieces called subatomic particles. But what exactly is an atom? What is it made of? What does it look like? The pursuit of the structure of the atom has married many areas of chemistry and physics in perhaps one of the greatest contributions of modern science! The parts of the atom: . chemistry and electromagnet...
  • Negative Charge And The Cathode Rays
    1,452 words
    Joseph John Thomson was born on December 18, 1856 near Manchester, England. His father died when "J.J.. ' was only sixteen. The young Thomson attended Owens College in Manchester, where his professor of mathematics encouraged him to apply for a scholarship at Trinity College, one of the most prestigious of the colleges at Cambridge University. Thomson won the scholarship, and in 1880 finished second in his class in the grueling graduation examination in mathematics. Trinity gave him a fellowship...

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