Calculating Atomic Mass Number and Numbers of Protons Electrons Neutrons by uExqTD45

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Calculating Atomic Mass & Number and Numbers of Protons, Electrons & Neutrons


Use the Periodic Table on pages 132-133 to fill in the blanks in the following table.

                  Element       Atomic        Atomic          # of          # of          # of
  Element
                  Symbol         Mass         Number        Protons      Electrons      Neutrons

   Chlorine


  Nitrogen


   Sodium


    Iodine


  Tellurium


   Barium


     Iron


    Neon


  Beryllium


   Oxygen


  Rubidium


    Sulfur


   Arsenic


 Potassium
                  Element       Atomic        Atomic           # of       # of       # of
  Element
                  Symbol         Mass         Number         Protons   Electrons   Neutrons

  Bromine


   Calcium


  Hydrogen


   Fluorine


 Magnesium


Phosphorous


   Helium


  Selenium


   Carbon


   Lithium


   Krypton


  Francium


  Aluminum


    Argon



Notes:
Atomic mass = # of protons + # of neutrons
Atomic mass (rounded) – # of protons = # of neutrons
Atomic number = # of protons
In a neutral atom, # of protons (p+) = # of electrons (e-)

								
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