Example image of eyePlorer eyePlorer map for 'Protactinium': Atomic number Chemical element Half-life Isotope Uranium-235 Uranium-238 Actinoid Superconductivity Alpha decay Beta decay Thorium-231 U-235 Critical mass Nuclear weapon Physicist Atlantic Ocean Glacier Ice age Paleoceanography Dmitri Mendeleev Mendeleev's predicted elements Thorium Uranium William Crookes Kazimierz Fajans Frederick Soddy Germany Great Britain Lise Meitner Otto Hahn Aristid von Grosse Crystal bar process United Kingdom Atomic Energy Authority Parts-per notation Uraninite Democratic Republic of the Congo Radionuclide Radioactive decay Nuclear isomer Actinium Decay product Isotopes of protactinium List of acronyms and initialisms: P Precious metal Protactinium(IV) oxide Protactinium(V) chloride Protactinium-230 1913 in science Mononuclidic element Thorium-234