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                     LESSON 1.  SECTION 1. (It matches lesson 7 of your textbook).

                                   CHEMICAL BOND. ELEMENT CLASSIFICATION.



 - Read here about periodic table’s history and how it was developed through several scientist’s work :


                               http://www.rsc.org/periodic-table/history/about



 - Elements classification : Metals, nonmetals and metalloids :









      SORTS OF CHEMICAL BONDS.

                                   (IONIC, COVALENT AND METALLIC BONDS).



             2. https://www.youtube.com/watch?v=CGA8sRwqIFg


             4. Covalent bond :
 
                  https://www.youtube.com/watch?v=ZxWmyZmwXtA

             5. Ionic versus covalent bond :

                 a) https://www.youtube.com/watch?v=5AOblYlknBc

                 b) https://www.youtube.com/watch?v=PKA4CZwbZWU




- If you have not understand yet what is the difference between an ionic and covalent bond, you have an easier videos here to get it !! :


              * Ionic bond :  https://www.youtube.com/watch?v=DEdRcfyYnSQ

              * Covalent bond :  https://www.youtube.com/watch?v=LkAykOv1foc




                         


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