d & f BLOCK
ELEMENTS
, D-block element table
3d Sc Ti V Cr Mn Fe Co Ni Cu Zn
4d T
Y Zr Nb Mo Ru Rh Pd Ag Cd
c
5d T
La* Hf W Re Os Ir Pt Au Hg
a
Used for Hydrogenation as
Catalysts
Coinage Metals
Pseudo Transition
Elements
,All TRANSITION ELEMENTS are
d-block elements but not all
d-block elements are transition
elements.
WHY ?
, Q. Why Zn, Cd, Hg are not considered as transition elements ?
Solution They don’t have partially filled d-orbital in neutral or in
excited state, so they cannot show the characteristic
properties of transition elements .
Neutral : Zn , Cd , Hg 3d106s2
Excited : Zn2+, Cd2+, Hg2+ 3d10
Note : La* is f-block element
(Lanthanide series)
La Lu
57 71
ELEMENTS
, D-block element table
3d Sc Ti V Cr Mn Fe Co Ni Cu Zn
4d T
Y Zr Nb Mo Ru Rh Pd Ag Cd
c
5d T
La* Hf W Re Os Ir Pt Au Hg
a
Used for Hydrogenation as
Catalysts
Coinage Metals
Pseudo Transition
Elements
,All TRANSITION ELEMENTS are
d-block elements but not all
d-block elements are transition
elements.
WHY ?
, Q. Why Zn, Cd, Hg are not considered as transition elements ?
Solution They don’t have partially filled d-orbital in neutral or in
excited state, so they cannot show the characteristic
properties of transition elements .
Neutral : Zn , Cd , Hg 3d106s2
Excited : Zn2+, Cd2+, Hg2+ 3d10
Note : La* is f-block element
(Lanthanide series)
La Lu
57 71
