Question

Why do noble gases have comparatively large atomic sizes???​

Answer 1

The atomic radii of noble gases are by far the largest in their respective periods. This is due to the reason that noble gases (because they do not form molecules) have only van der Waals radii while others have covalent radii. ... That is why noble gases have comparatively large atomic sizes

I hope this helps you

Answer 2

Answer:

because they have vander waals radii only which are expected to have larger mangnitude where other member of a period have either covlant or metallic radii which are less in mangnitude