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  1. #1
      Eiman
    Jul 2011
    -
    14,750

    :
    1- ( O2 ,H2 ,Fe ,Na)
    2-
    :Na+1 =1Ca+2, =2,Cl-1 =-1
    3- =+1
    :H2O, H2SO4 ,CO2, CH3OH NaH=-1
    4- (O-O) 2
    :H2O ,H2SO4 ,NO ,CO2
    H2O2 =-1 OF2 =+2 -1 .
    5-
    :CCl4← =-1,=+4, CH4 =+1,=-4
    6-
    : NH4Cl =4*(+1), =-1 =-3 -3+4-1=0
    7-
    : NH4+1 =4*(+1) =-3 -3+4=0
    8- =
    :
    (1-3) .
    .
    .
    =+3
    .......

  2. #2

    Jul 2011
    -
    15,678

    :


  3. #3

    Aug 2011
    -
    2,564

    :

    ..

  4. #4

    Jul 2011
    -
    1,260

    :





  5. #5
      Raed
    Jul 2011
    -
    1,052

    :


  6. #6
      Noor
    Jul 2011
    857

    :


  7. #7

    Jul 2011
    -
    936

    :

    Thank you

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