Oxidation

[tanya06]

I need help in telling what element is more oxidized

For example:

-tin in either Sn(+2) ion or Sn(+4)


-Chlorine in either ClO₃(-) ion or Cl(-) ion

[Xen]

what element is more oxidized

-tin in either Sn(+2) ion or Sn(+4)
Sn(+4) is more oxidize since it has lost 4 electrons

-Chlorine in either ClO₃(-) ion or Cl(-) ion
Cl in ClO₃(-) has formal charge of +5 and thus is more oxidized than Cl-.