Question

why are radii nobel gas large​

Answer 1

Answer:

Now, the actual reason of that why noble gases have comparatively large atomic sizes is because in case of inert or noble gases all the orbitals are completely filled means they have s2p6 configuration and hence inter electronic repulsions are maximum resulting they do not form molecules

Answer 2

Answer:

Now, the actual reason of that why noble gases have comparatively large atomic sizes is because in case of inert or noble gases all the orbitals are completely filled means they have s2p6 configuration and hence inter electronic repulsions are maximum resulting they do not form molecules, moreover in case of noble gases atomic radius is determined bye van der Waals radius which is large then covalent radii as well as the lonic radii.