The second and third members in each group of the transition elements – InterviewSolution

InterviewSolution

1.	The second and third members in each group of the transition elements have similar metallic radii. Assing reason.
Answer» This is because of lanthanoid contraction in the members of the lanthanoid family (Z=58 to Z=71) which occupy a position along with Lanthaum (Z=57) in the perodicd table. However, these are placed separately at the bottom of the table in the f-block. The lanthanoid contraction also decrease the size of the elements of the third transition series (Hf onward). As a result, there is a negligible difference in the metallic radii of the second and third members in each group of transition metals.

Discussion

No Comment Found

Related InterviewSolutions

Lanthanide series start from the elements with atomic numberA. 27 to 71B. 58 to 71C. 56 to 70D. 60 to 74
The correct order of ionic radii of `Y^(3+), La ^(3+), Eu ^(3+) and Lu ^(3+)` isA. `Y^(3+) lt Lu ^(3+) lt Eu ^(3+) lt La ^(3+)`B. `La ^(3+) lt Eu ^(3+) lt Lu ^(3+) lt Y^(3+)`C. `Lu ^(3+), lt Eu ^(3+) lt La ^(3+) lt Y ^(3+)`D. `Y ^(3+) lt La ^(3+)lt Lu ^(3+) lt Eu^(3+)`
Lanthanide contraction is due to increase inA. iionic radiiB. shielding of 4f electronsC. effective nuclear chargeD. size of 4f orbitals
Lanthanide contraction is related toA. valence electronB. ionic radiiC. densitiesD. nuclear mass of various membere of the series
The steady decrease in atomic size in lanthanide series is called lanthanide confraction and in all amounts toA. 150 PmB. `10 Pm`C. `20 Pm`D. `40 Pm`
Lanthanide contraction is due to increase inA. shielding of 4f electronsB. effective nuclear chargeC. atomic numberD. size of 4f orbital
Lanthanide contraction due toA. poor shielding of 5f orbitalsB. poor shielding of 3f orbitalsC. prerfect shielding of 4f orbitalsD. poor shielding of 4f orbitals
The lanthanide contraction is responsible for the fact thatA. Zr and Yb have same sizeB. Zr and Nb have same oxidation sateC. Zr and Hf have same radiusD. Zr and Zn have same oxidation state
The most characteristic oxidation state of lanthanide isA. `+2`B. `+3`C. `+4`D. `+6`
Name a member of lanthanide series which is well known to exhibit `+4` oxidation state `,`A. CeB. LaC. LuD. Pr