DUBNIUM

Depending on how old you are or which side of the Cold War / Bering Strait you happened to live in during that time of two superpowers, you may have memories of seing element 105 with the name of either Nilsborium or Hahnium; which were the names initially suggested by the labs in the USA and former USSR which independently claimed discovery. Because of the individual claims for 104 and 105, in 1997 the IUPAC decided to honour both claims; naming 104 rutherfordium as per the American suggestion, and because a German team had already named an element Bohrium, they named 105 Dubnium for Dubna, the region in Russia with the big particle accelerator where many elements have been born.

Some of the longer lived trans-actinides of the d-block have been found to have some chemical properties similar to their periodic neighbours, and so it might be that Dubnium has chemical properties similar to niobium and tantalum. For whatever that is worth. In any case, Dubnium, in the general trend of the trans-actinides, is artificially produced and short-lived, produced by bombarding a Berkelium target with projectiles of oxygen. Dubnium has a somewhat nice half-life for a trans-actinide - the 267 isotope has 1/2 l of 1.4 hours - long enough for some research, but alas, not long enough for a sample in an element collection. The glowing powder and fusion route must suffice.