Noble gases have comparatively large atomic sizes because they have van der Waals’ radii only which are expected to have larger magnitude, whereas other members of a period have either covalent or metallic radii which are less in magnitude.
Noble gases have comparatively large atomic sizes because they have van der Waals’ radii only which are expected to have larger magnitude, whereas other members of a period have either covalent or metallic radii which are less in magnitude.