Question

For the element, $X$, student Mansi measured its radius as 102 nm, student Rohit as 203nm. and Ankur as 100 nm. using the same apparatus. Their teacher explained that measurements were correct by saying that recorded values by three students were:

• A. crystal, van der waal and covalent radii
• B. covalent, crystal and van der waal radii
• C. van der Waal, ionic and covalent radii
• D. none is correct

Answer 1

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

Since radii$=$Van dar waal$>$ Metallic$>$ Covalent$.$

Hence$,$ he records value of $102$ nm as metallic $($Crystal radii$)$ and $100$ nm as covalent radii$,$ and $203$ nm as Van der waal equation$.$