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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 average mass of all the isotopes of an element
  3. the sum of the number of neutrons and protons in an atomic nucleus

3 True/False questions

  1. nucleuscenter of an atom made up of protons and neutrons


  2. protonthe smallest component of an element having the chemical properties of the element


  3. electron clouda subatomic particle that has a negative charge


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