English Promethium Cited by user Nucleus hydro elemon on 13 Sep 2024 Promethium is a chemical element with symbol Pm and atomic number 61. All of its isotopes are radioactive; it is extremely rare, with only about 500–600 grams naturally…
English Promethium(III) chloride Cited by user Nucleus hydro elemon on 03 Sep 2024 Promethium(III) chloride is a chemical compound of promethium and chlorine with the formula PmCl3.
Catalan Prometi Cited by user Antoni Salvà on 21 Nov 2023 El prometi és un element químic de la taula periòdica, el símbol del qual és Pm i el seu nombre atòmic és 61, i pertany al grup dels lantanoides.