Hi there,
Here is my big dilemma:
- According to many people, diamagnetic species contain only paired electrons. Now I found one person on a forum saying if more than 2 unpaired electrons then it is also diamagnetic (first time ever I read that). Then some ppl say all elements are diamagnetic, Bismuth the most. Other say only earth metals, noble gases and Zn group are diamagnetic. That makes sense to me since these guys have ONLY paired electrons.
But why Bismuth [Hg]6p3 ?? Is that because of the "more than 3 electrons" rule ? Then why ?
Here, the parallel or opposite direction of the induced magnetic moment in presence of an external magnetic field doesn't seem to be related. Everyone agrees that diamagnetic = parallel.

- About ferromagnetism: can a ferromagnetic species be re- permanently magnetized (i.e. get its ferromagnetic character back) once exposed to Curie point or does it stay paramagnetic forever (poor guy, he was so great !)

- Finally, (if you have some more seconds to read), why aren't elements with p unpaired electrons ferromagnetic ? Is it just because their exchange energy is not positive ? (i.e. interatomic distance to large)

Thanks for your answers everyone (especially the experts in magnetism ).

Well, I'm not very impressed by this Physics forum. May be my questions were not clear ? Or is it some chemistry despising ?
Anyway, I got some sort of answers from somewhere else.
Thx anyway...

Sometimes it takes time for people to answer, especially when it is a very specific sort of question.