Nucleus of an atom

Nucleus of an atom

1. COMPOSITION of NUCLEUS

   • consists of protons and neutrons
     • known as nucleons
   • very small compared to size of an atom
   • nuclide notation
     • proton number
       • number of protons in a nucleus
     • nucleon number
       • mass number
     • nuclide
       • type of atom with particular proton and nucleon number
       • can be presented by a nuclide notation consists of
         • symbol of element
         • proton number
         • nucleon number
   • isotopes
     • atoms of certain element that have
       • same protons number
       • different nucleon number
     • same chemical properties
       • different physical properties

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