• Basic structure of atom (2)
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  • An atom has 8 protons, 8 electrons and 8 neutrons. How many particles are in its nucleus?
    16 particles (protons and neutrons)
  • An atom has 11 protons. How many electrons does a neutral atom have?
    11 electrons
  • An atom has 13 protons and 14 neutrons. Calculate its mass number.
    A=Z+N=13+14=27
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