Assertion: atom's electron | /r/HasProperty | unpaired
Facets:
Source sentences:
text: An atom with an odd number of electrons must have an unpaired electron.
text: Therefore, a simple rule of thumb is used in chemistry to determine whether a particle (atom, ion, or molecule) is paramagnetic or diamagnetic: If all electrons in the particle are paired, then the substance made of this particle is diamagnetic; If it has unpaired electrons, then the substance is paramagnetic.