What is the oxidation number of the underlined atoms in the following :
(a) `Na_(2)Cr_(2)O_(7)`
(b) `Na_(3)PO_(4)`

What is the oxidation number of the underlined atoms in the following ? Kul(Mn)O_4,Na_2ul(Cr)_2O_7, ul(Fe)_3O_4,Kul(Cl)O_3,ulPO_4^(3-)ul(C)Cl_4

Calculate the oxidation number of each sulphur atom in the following compounds. (a) Na_(2)S_(2)O_(3) " " (b) Na_(2)S_(4)O_(6) " " ( c) Na_(2)SO_(3) " " (d) Na_(2)SO_(4)

Calculate the oxidation number of each sulphur atom in the following compounds. (a) Na_(2)S_(2)O_(3) " " (b) Na_(2)S_(4)O_(6) " " ( c) Na_(2)SO_(3) " " (d) Na_(2)SO_(4)

Find the oxidation number of the underlined atoms. Na_2underlineB_4O_7