Comparethe stability of +2 oxidation state for the elements of the firsttransition series.
Comparethe stability of +2 oxidation state for the elements of the firsttransition series.
-
Sc
+3
Ti
+1
+2
+3
+4
V
+1
+2
+3
+4
+5
Cr
+1
+2
+3
+4
+5
+6
Mn
+1
+2
+3
+4
+5
+6
+7
Fe
+1
+2
+3
+4
+5
+6
Co
+1
+2
+3
+4
+5
Ni
+1
+2
+3
+4
Cu
+1
+2
+3
Zn
+2
Fromthe above table, it is evident that themaximum number of oxidation states is shown by Mn, varying from +2 to+7. The number of oxidation states increases on moving from Sc to Mn.On moving from Mn to Zn, the number of oxidation states decreases dueto a decrease in the number of available unpaired electrons. Therelative stability of the +2 oxidation state increases on moving fromtop to bottom. This is because on moving from top to bottom, itbecomes more and more difficult to remove the third electron from thed-orbital.
-
Sc
+3
Ti
+1
+2
+3
+4
V
+1
+2
+3
+4
+5
Cr
+1
+2
+3
+4
+5
+6
Mn
+1
+2
+3
+4
+5
+6
+7
Fe
+1
+2
+3
+4
+5
+6
Co
+1
+2
+3
+4
+5
Ni
+1
+2
+3
+4
Cu
+1
+2
+3
Zn
+2
Fromthe above table, it is evident that themaximum number of oxidation states is shown by Mn, varying from +2 to+7. The number of oxidation states increases on moving from Sc to Mn.On moving from Mn to Zn, the number of oxidation states decreases dueto a decrease in the number of available unpaired electrons. Therelative stability of the +2 oxidation state increases on moving fromtop to bottom. This is because on moving from top to bottom, itbecomes more and more difficult to remove the third electron from thed-orbital.
