Orbital names such as 1s, 2s, 2p, etc. do not require Nemeth Code. In addition, we do not retain italics for the letters in orbital names. As you say, wherever a superscript is included, Nemeth Code is certainly required (with italics still ignored).
This reply was modified 4 years, 5 months ago by kdejute. Reason: answer confirmed; language changed to reflect that