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3 Written questions

3 Multiple choice questions

  1. one of two or more atoms with the same atomic number but with different numbers of neutrons
  2. the sum of the number of neutrons and protons in an atomic nucleus
  3. a region around the nucleus of an atom where electrons are likely to be found

3 True/False questions

  1. atoma subatomic particle that has a positive charge and that is found in the nucleus of an atom

          

  2. protonone of two or more atoms with the same atomic number but with different numbers of neutrons

          

  3. atomic mass unitthe average mass of all the isotopes of an element