5. bonds-
   b. covalent 
       1. non-polar- O2: H-H O=O,  N2: N=N, NH3: H    H, CH4: H    H
                                                                                    N                  C
                                                                                    H               H    H
 * cant find good pictures of the diagrams, ask somebody you sit by if they can show you the diagrams.
Life's building blocks-
Hydrogen chain (H)- one single bond
Oxygen (O)- O= 1 double bond,  -O- 2 single bonds          -
Nitrogen (N)- N -= 1 triple bond, -N= 1 double, 1 single, -N- 3 single      -
Carbon (C)- -C-=1 triple 1 single, =C= 2 double -C= 1 double 2 singles -C - 4 singles
                                                                                                                  -
      2. Polar Covalent Bonds- electrons are shared unequally
    H2O     (-)
             ee--ee
            (    O  )      Na+    Cl-
            ee--ee           C. Hydrogen- weak bond that forms between 2 polar molecules
           (          )
             H    H
                (+) 
6. Properties of H2O- H2O is polar and because of the it (is):
        A. Cohesive- sticks to itself ( helps overcome gravity)
        B. Adhesive- sticks to other polar substances.