D and F block elements

Recite the elements of 3d series and 4d series

3d - Sc Ti V Cr Mn Fe Co Ni Cu Zn

21 22 23 24 25 26 27 28 29 30

4d - Y Zr Nb Mo Tc Ru Rh Pd Ag Cd

39 40 41 42 43 44 45 46 47 48

Atomic numbers of Pd, Ag, Pt, Au, Hg

46 47 78 79 80

General configuration of d block elements is -

Expectional figuration of Pd -

(n-1)d 1-10 ns1-2

4d10 5s0

Which elements of the 4d series have only 1 electron in valence shell

Nb, Mo, Tc, Ru, Rh, Ag

Elements which are studied under d block but are not transition elemts are-

Give reason

Zn, Cd, Hg, Cn

They have fully filled orbitals in ground state as well as in their common oxidation states. Transition elements are the elements which have incomplete d-subshell

Elements of d-block which do not behave as typical metals are -

Give reason.

Zn, Cd, Hg - fully filled d orbital. No electrons left for covalent metallic bonding thus metals are weak.

Mn - d5 config is tightly held by nucleus which doesn’t facilitate bond formation