Q. 204.0( 1 Vote )
Although Zirconium belongs to 4d transition series and Hafnium to 5d transition series even then they show similar physical and chemical properties because___________.
A. both belong to d-block.
B. both have same number of electrons.
C. both have similar atomic radius.
D. both belong to the same group of the periodic table.
Due to lanthanide contraction, the f electrons shield very poorly which leads to an increase in effective nuclear charge and hence a contraction in size. So, the atomic radii of Zirconium and Hafnium are very similar and therefore they have similar physical and chemical properties.
Rate this question :
On the basis of Lanthanoid contraction, explain the following :
(i) Nature of bonding in La2O3 and Lu2O3.
(ii) Trends in the stability of oxo salts of lanthanoids from La to Lu.
(iii) Stability of the complexes of lanthanoids.
(iv) Radii of 4d and 5d block elements.
(v) Trends in acidic character of lanthanoid oxides.
Chemistry - Exemplar
Which of the following lanthanoids show +2 oxidation state besides the characteristic oxidation state +3 of lanthanoids?Chemistry - Exemplar
Which of the following actinoids show oxidation states upto +7?Chemistry - Exemplar