1. Tardigrade
  2. Question
  3. Chemistry
  4. In d -Block when atomic size of one series are compared with those of corrosponding element in other series :- (I) Increase from the first (.3d.) to second (.4d.) series (II) Increase from the second (.4d.) to third (.5d.) series (III) Virtually the same as first (.3d.) and in second (.4d.) series (IV) Virtually the same as second (.4d.) and in third (.5d.) series

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Q. In $d$ -Block when atomic size of one series are compared with those of corrosponding element in other series :-
(I) Increase from the first $\left(\right.3d\left.\right)$ to second $\left(\right.4d\left.\right)$ series
(II) Increase from the second $\left(\right.4d\left.\right)$ to third $\left(\right.5d\left.\right)$ series
(III) Virtually the same as first $\left(\right.3d\left.\right)$ and in second $\left(\right.4d\left.\right)$ series
(IV) Virtually the same as second $\left(\right.4d\left.\right)$ and in third $\left(\right.5d\left.\right)$ series

NTA AbhyasNTA Abhyas 2020

Solution:

$I & II & III & IV \\ 3d & 4d & 3d & 4d \\ \overset{\land }{4 d} & \overset{\land }{5 d} & \overset{\approx}{4 d} & \overset{\approx}{5 d}Lanthanidecontraction$