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Standard Atomic Notation

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					Standard Atomic Notation

 AtomicMass
    Atomic #       Symbol
Ex: Carbon : Atomic Number (Z=6)
             Atomic Mass 12.01 (round to the nearest whole number) 12 amu


12
 6    C
↑ for any atom the atomic number is equal to the number of protons and electrons.

** all atoms MUST BE electrically neutral.


Question: Find the number of protons (p+), neutrons (no), and electrons (e-).

      Element                 Protons               Neutrons                 Electrons

        12
         6   C

        64
        29   Cu

        23
        11   Na

       24
       12    Mg




Homework

Indicate the number of protons, neutrons, and electrons for the following:

   a) aluminum
   b) helium
   c) vanadium

Draw Bohr-Rutherford diagrams for each as well.

				
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