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3 Written questions

3 Multiple choice questions

  1. the very small center core of an atom
  2. the number of protons in its nucleus
  3. have a positive charge and are in the nucleus

2 True/False questions

  1. mass numberthe sum of the protons and neutrons in the nucleus of an atom


  2. isotopesatoms with the same number of protons and a different number of neutrons