Question

For the element $\left(X\right)$, student $\left(A\right)$ measured its radius as $102$ nm, student $\left(B\right)$ as $103$ nm and $\left(C\right)$ $100$ nm using same apparatus. Their teacher explained that measurements were correct by saying that recorded values by $\left(A\right),\left(B\right)$ and $\left(C\right)$ are:

• A. crystal, van der Waals' and covalent radii
• B. covalent, crystal and van der Waals' radii
• C. van der Waals', ionic and covalent
• D. none of the above is correct

Answer 1

The correct option is A crystal, van der Waals' and covalent radii

As we know,
Van der wall's radius > Metallic radius (crystal) > Covalent radius
So A, B and C are crystal, van der Waals' and covalent radii respectively.