Word: neptunium
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...want to make a statement with a really, really expensive metal, you could go with osmium. My personal favorite is gadolinium. When you say it fast, it sings. On the more fanciful side, californium, for the laid-back customer, einsteinium, for the exceptionally wise money manager, neptunium, for stratospheric credit limits, and, for those just starting out, lead. --Tim Foecke, metallurgist, National Institute of Standards and Technology
...dust. First radioactive material from the May 21 explosion was brought home by the tuna boat Stiruga Maru. Analyzed by Dr. Kenjiro Kimura of Tokyo University, it proved to contain a familiar array of fission products-ruthenium, rhodium, tellurium, iodine, cerium, neodymium, etc.-as well as uranium 237 and neptunium 239. This combination of elements indicated that the explosion was the "fission-fusion-fission" type, which gets much of its energy from the fission of normally inactive uranium...
...Sharers of the chemistry prize were the University of California's Edwin M. McMillan and Glenn T. Seaborg. Both were leaders of teams that synthesized the "transuranian elements," i.e., elements heavier than uranium (atomic number 92). First made was neptunium (No. 93), which McMillan named after the planet just outside Uranus. Neptunium turns spontaneously into plutonium (No. 94), used in atom bombs. The other transuranian elements, also produced for the first time at Berkeley: americium (No. 95), curium (No. 96), berkelium (No. 97) and californium...
Atomic experts bombarded uranium with atomic particles from the cyclotron and produced neptunium, a new "synthetic" element with 93 electrons. Next, Dr. Glenn T. Seaborg and co-workers discovered plutonium (No. 94), and, four years later, at the University of Chicago, americium (No. 95) and curium (No. 96). Last week tall, gaunt, 37-year-old Chemist Seaborg and his associates were in the news again. By bombarding americium with alpha particles, they had produced another new element, with 97 electrons...
...others: neptunium, No. 93; plutonium, No. 94; americium...