Google’s answering every question except the one I’m asking it and using words that hurt my brain.
It basically sounds to me like oxidation and reduction are just specific ways of describing ionisation, but atoms described as oxidised/reduced are written with roman numerals, whereas atoms described as ionised are written with normal numbers, which seems to me to suggest that they’re different.
Edit: I’m just now remembering the atoms I’ve seen written with normal numbers were describing isotopes, not ions. I am a dumb. Still though, I could be misunderstanding ionisation & oxidation.