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3 Written questions

3 Multiple choice questions

  1. may be a diagram, a mental picture, a mathematical statement, or an object that helps explain ideas about the natural world.
  2. atoms with the same number of protons and a different number of neutrons
  3. have a positive charge and are in the nucleus

2 True/False questions

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

          

  2. nucleusthe very small center core of an atom

          

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