Answers

2015-04-15T14:44:11+05:30
Oxidation states simplify the whole process of working out what is being oxidised and what is being reduced in redox reactions
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2015-04-15T14:44:55+05:30
The oxidation state is the difference between the number of electrons associated with an atom in acompound as compared with the number of electrons in anatom of the element. In ions,the oxidation state is the ionic charge. 

ex:- 
NaCl   = Na(+1) and Cl(-1).........

hope its help u
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