What is the difference between Valency and Oxidation number?????

1.	What is the difference between Valency and Oxidation number?????
Answer» \tValenceyOxidation Number1. It is the combining capacity of an element in terms of the number of hydrogen atoms with which the element may combine e.g. valency of S in H2S is 2 and that of N in NH3 is 3.1. It is the charge which an atom of the element has or appears to have when present in the combined state with their atoms e.g. oxidation number of N in HNO3 is +5.2. It is purely a number and has no plus or minus sign associated with it. e.g. valency of N in NH3 is 3 and that of H is 1.2. It is always assigned plus or minus sign except when it is zero e.g. oxidation number of N in NH3 \xa0is -3 and that of H is +13. It is always a whole number.3. It may not always be a whole number but may be fractional also. The e.g. oxidation number of Fe in Fe3O4 \xa0is +8/3.\t\xa0

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