Which type of atomics radius is used for noble gases?

Options

A. Covalent radius
B. Metallic radius
C. van der Waals
D. Ionic radius

Answer

3

Explanation

The atomic radii of `18` element are all very large and increase on decending the group .It must be noted that these are nonbounded radii and should be compared with va der Waals radii of other elements rather than with covalen (bonded) radii
The minimum increase is observe from `Ar (190 p m)` to `Kr(200 p m)`.