Question
Chemistry Question on The Lanthanoids
The effect of lanthanoid contraction in the lanthanoid series of elements by and large means :
A
decrease in both atomic and ionic radii
B
increase in atomic radii and decrease in ionic radii
C
increase in both atomic and ionic radii
D
decrease in atomic radii and increase in ionic radii
Answer
decrease in both atomic and ionic radii
Explanation
Solution
Due to Lanthanoid contraction both atomic radii and ionic radii decreases gradually in the lanthanoid series.