esr

The phenomenon of electron spin resonance (ESR) is based on the fact that an electron is a charged particle which spins around its axis and this causes it to act like a tiny bar magnet. In technical language we say that it has a magnetic moment, the value of which is called the Bohr magneton.

and john , first complete wats there in syllabus.

k..............this tiny bar thing i knew............but what it has got to do with stability????