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3 Written questions

3 Multiple choice questions

  1. a subatomic particle that has a positive charge and that is found in the nucleus of an atom
  2. the sum of the number of neutrons and protons in an atomic nucleus
  3. one of two or more atoms with the same atomic number but with different numbers of neutrons

3 True/False questions

  1. atomic mass unita unit of mass that describes the mass of an atom or molecule

          

  2. atomic massthe average mass of all the isotopes of an element

          

  3. nucleusone of two or more atoms with the same atomic number but with different numbers of neutrons

          

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