Bonding: Bonds & Electronegativity

Types of Bonds:
        -There are three main types of bonds
           1)Ionic Bonds
                  - e- are tranferred from metal to nonmetal
           2) Covalent Bonds
                  -e- are shared between non-metals
           3) Metallic Bond 
                  - holds pure metals together by electrostatic attraction
Electronegativity:
        -Electronegativy is a measure of an atom's attraction for electrons in a bond.
            -Atoms with greater electronegativity attract e- more.
            -Polar covalent bonds form from an unequal sharing of e- while non polar covalent bonds form from equal sharing of e-.
Bonds:
        -The type of bond formed can be predicted by looking at the difference in electronegativity of the elements.
en > 1.7= ionic bonds
en<1.7= Polar covalent bonds
en=0= Non-polar covalent bonds
http://www.youtube.com/watch?v=R-zbdQxAhD4
http://www.youtube.com/watch?v=pLuXJQ_uHdE

-Candace Chan