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atomic structure of matter

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  • The number of protons in the nucleus is ......
    atomic number
  • The sum of protons and neutrons in nucleus in atom is ...........
    mass number
  • The mass of atom is concentrated in ..................
    nucleus
  • the nucleus of ...... atom doesn't contain neutrons
    hydrogen
  • the mass number of an atom having 13 protons and 14 neutrons is ........
    27
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