Chemistry Unit 8 Worksheet 4 - DOC by xad14601

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									                           Chemistry Unit – Worksheet
  Name – Key 2009
  Period - ____________________

  Complete the following chart for Atomic Numbers and Atomic Masses.


# of Protons # of Electrons # of Neutrons Atomic Number Atomic Mass
  7                   7                      4                   7                11
  8                   8                      6                   8                14
  10                  10                     9                  10                19
  14                  14                     8                   14               22
  27                  27                     14                  27               41

       


     Complete the following chart using the Periodic Chart of the Element presented
  Chlorine
     Atomic Number - 17 (protons)                           Atom Diagram
     Atomic Mass – 35.453 ( protons + neutrons)
     Element – Chlorine (name) - Cl (symbol)
     # of Protons - 17
     # of Electrons - 17
     # of Neutrons – 18.453

       

       Draw a Lewis Dot Model for an Oxygen atom.
          (Electron Shells contain 2 – 8 – 18 (8) electrons)


                                         ..
                                     .
                                         O:
                                         .
  Distinguish between isomers, ions, and isotopes.
         Isomers are variations in structural formulas of a empirical formula creating new
  characteristics. Ions are charged atoms. Isotopes are variations in the number of
  neutrons in an atom.



                                                                             Updated 9/11/07

								
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