Question

Explain the trend in atomic radii of d- block elements​

Answer 1

Atomic and Ionic Radii of D Block Elements

The larger decrease in atomic radii, in column 3 to 6 elements is due to the increase in effective nuclear charge but poor shielding because of the smaller number of d-electrons.

Answer 2

Answer:

There are four series in the d block corresponding to the filling up of 3d, 4d, 5d or 6d orbitals.

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

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

5d- La, Hf, Ta, W, Re, Os, Ir, Pt, Au, Hg

6d- incomplete.

There are 10 elements filling up the ‘d’ orbital in each series