What sublevels are completely full for noble gases?

Answer 1

Noble gas means that the outermost electron shell is completely full. The which orbital varies with the element; for example, helium has the 1s2 orbital full.

Answer 2

Noble gases have completely full sublevels for their valence electron configuration. Helium has 1s^2, neon has 1s^2 2s^2 2p^6, argon has 1s^2 2s^2 2p^6 3s^2 3p^6, krypton has 1s^2 2s^2 2p^6 3s^2 3p^6 3d^10 4s^2 4p^6, xenon has 1s^2 2s^2 2p^6 3s^2 3p^6 3d^10 4s^2 4p^6 4d^10 5s^2 5p^6, and radon has 1s^2 2s^2 2p^6 3s^2 3p^6 3d^10 4s^2 4p^6 4d^10 4f^14 5s^2 5p^6.