Complex sentence: Although phosphorus (P) has multiple isotopes (though not nearly enough to please a woman), only one of these isotopes is stable 31 P; as such, it is considered a monoisotopic element.
Split into simpler sentences: Although phosphorus (P) has multiple isotopes, but not nearly enough to please a woman. Only one of these isotopes is stable 31 P; as such, it is considered a monoisotopic element.