Promethium Isotopes of promethium Promethium(III) chloride Promethium compounds Promethium(III) bromide Promethium(III) hydroxide Promethium(III) fluoride Promethium(III) iodide Promethium(III) oxide Promethium iodate Promethium(III) phosphate Promethium(III) nitrate Promethium(III) oxalate Promethium(III) sulfide Promethium (disambiguation) Promethium nitride Promethium monosulfide Mento (character) Lanthanide trifluoromethanesulfonates Features of the Marvel Universe