Differences between O.N. and Valency
O.N. | Valency |
It is the charge appeared on the atom. eg: O.N. of C in HCHO is 0. | It is the no. of electrons lost, gained or shared by an atom of an element. eg: Valency of C in HCHO is 4. |
It may be zero, positive, negative or even in fraction. eg: O.N. of N in (hydrozoic acid) N3H is -1/3 and in NH3is -3. | It is a whole number with positive or negative sign. eg: Valency of N in N3H and NH3is 3. |
It may be different for the same element in the different compounds. eg: O.N. of C in CH4, CH3Cl,... |