Might be broken cut-and-paste obscuring the meaning. If you copy ⁶³Ni (written that way or using html <sup>) and the two programs involved share only fontless

Might be broken cut-and-paste obscuring the meaning. If you copy ⁶³Ni (written that way or using html ^{) and the two programs involved share only fontless ASCII as format, the conversion via ASCII might leave 63Ni or 63 Ni (if the} becomes a wordbreak); easy to misunderstand.