rhenium

noun 0.655

pertechnetate

noun 0.607

perchlorate

noun 0.590

percarbonate

noun 0.552

persulfate

noun 0.546

perchloride

noun 0.543

perchloric acid

noun 0.521

ferrate

noun 0.511

lithium perchlorate

noun 0.511

prephenate

noun 0.510

peroxyacetyl nitrate

noun 0.509

prehnite

noun 0.508

periodate

noun 0.505

neptunium

noun 0.501

pentachloride

noun 0.501

vanadate

noun 0.500