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Writing Chemical Formula

Abhishek J.
29/11/2019 0 0

WRITING CHEMICAL FORMULA-

*The Chemical Formula is a representation of a substance [element or compound] by means of the symbol.                                             THE RULES FOR WRITING CHEMICAL FORMULA ARE-

*The Symbol Of the elements should be known.

*The Valency of the elements should be known. 

SOME ELEMENTS WITH POSITIVE AND NEGATIVE VALENCIES-

+VE VALENCY    ELEMENT  SYMBOL   ION

V-1                     Potassium    K              K1+

                           Sodium           Na            Na1+

V-2                     Calcium          Ca            Ca2+

                          Magenisum     Mg           Mg2+

V-3                    Aluminium       Al             Al3+

 

 

-VE VALENCY    ELEMENT    SYMBOL    ION

V-1                   Chlorine           Cl                Cl1-

                          Bromine           Be               Br1-

V-2                    Oxide                O                O2-

                          Sulphide           S                 S2-

V-3                    Phosphate      Po4                PO43-

 

 

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