Question

among the following the correct order of radii is

A. van der waals' radii < metallic radii
B. metallic radii <van der waals' radii
C. covalent radii >van der waals' radii
D. crystal radius <covalent radius​

Answer 1

Answer: The correct answer is option (B).

Explanation:

Since the van der Waals forces are much weaker than the forces acting between atoms in a covalently bonded molecule and the  bonding forces in the metallic crystal lattice are much stronger than the van der Waals forces. Therefore correct order of radii is:

Van der wall's radius  > Metallic radius  > Covalent radius

Therefore correct answer is option (B).

Metallic radii < Van der waal's radii

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Answer 2

Answer:

The correct order for the radii is as follows:

A. van der waals' radii < metallic radii

Explanation:

Van der Waals radius is the half the closest distance of two equal and non-covalently bound atoms. The forces are weak in nature as compared to metallic as well as covalent forces.

The metallic radii is the radii of the metallic atoms. It is the internuclear distance between two nearest metal atoms in a metal.

Metallic radii are smaller than the van der Waals' radii, as the bonding in metallic radius is much more stringer than the van der Waals' radii.

Therefore correct order of radii is:

Van der waals' radii < metallic radii

Thus, the correct answer is option (A).

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Explanation: