Formation of Chemical Compound | Chemistry Notes Info - Your Chemistry Tutor provide notes for Classes, BSc, MSc, Chemistry Test

Formation of Chemical Compound

Formation of Compound

                                      We get chemical formula of molecule by writing valence of 1st atom in front of 2nd atom and valence of 2nd atom in front of 1st atom.
Example: valence of carbon is 4 and oxygen is 2, write 4 in front of O and 2 in front of C in subscripts as shown below.
C2O4
as we see, both valences are multiple of two so divide it by two to get CO2 formula.
Similarly,
           Na+ + CO3-2   ---> Na2CO3
          Al+3 + SO4-2  --->  Al2(SO4)3
          Mg+2 + N-3    --- Mg3N2



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