vocab words
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| Atom | the smallest particle of an element that can exist alone or in combination
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| Neutron | a particle that has a mass nearly equal to that of the proton but no electrical charge is present in all atomic nuclei except those of hydrogen
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| Proton | a very small particle that occurs in the nucleus of every atom and has a positive charge of electricity
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| Electron | a very small particle that has a negative charge of electricity and travels around the nucleus of an atom
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| Ion | an atom or group of atoms that carries an electric charge
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| Isotope | any of two or more species of atoms of a chemical element with the same atomic number and position in the periodic table and nearly identical chemical behavior but with differing atomic mass or mass number and different physical properties
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| Atomic number | an experiemntally determined number characteristic of a chemical element that represents the number of electrons outside the nucleus and that determines the place of the element in the periodic table
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| Nucleons | protons or neutrons in the atomic nucleus
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| Nuclide | a species of atom charcterized by the constitution of its nucleus and hence by teh number of protons, the number of neutrons, and the energy content
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| Mass number | an integer that expresses the mass of an isotope and designates the number of nucleons in the nucleus
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| John Dalton | developed the Atomic theory
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| JJ Thompson | discovered the electron using the Cathode Ray Tube
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| Democritus | viewed matter as made of smaller particles
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| Ernest Rutherford | discovered the existence of nucleus using the Gold Foil Experiment
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| Neils Bohr | developed the planetary model
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| James Chadwick | discovered the neutron
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| Robert Millikan | discovered the electron charge and mass of an electron using the Oil Drop Experiment
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