1. Tardigrade
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  3. Chemistry
  4. Zr( Z =40) and Hf ( Z =72) have similar atomic and ionic radii because of :

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Q. $Zr( Z =40)$ and $Hf ( Z =72)$ have similar atomic and ionic radii because of :

NEETNEET 2021The d-and f-Block Elements

Solution:

$Zr$ and $Hf$ have same size due to Lanthanoid contraction