The first experiments were started in 1976 by a Soviet team led by Y. Oganessian at the Joint Institute for Nuclear Research at Dubna, who produced isotope Bohrium-261. With heavy nuclei of Chromium-54. In this experiment the was performed by bombarding of the fast rotating cylinder coated by a thin layer of Bismuth-204. By a tangentially directed stream of Chromium-54. German scientists have offered name Nielsbohrium.

Element Molybdenum, Mo, Transition Metal. Comes from the Greek molybdos. Meaning lead and the mineral lead glance. This was confused with molybdenite. All three minerals were previously known as molybdaena. In 1758, Cronstedt presumed that molybdenite. Are different minerals; 20 years late Scheele proved it obtaining Mo. Which he called Wasserbleyerde or molybdenum acid. Is a typical rare element with crustal abundance 1. The main commercial mineral, forming hydrothermal deposits; H.

Element Ruthenium, Ru, Transition Metal. Klaus fused it with saltpeter and isolated the water soluble part. The insoluble part was treated by aqua regia. Then separated the part of crude platinum that was insoluble in aqua regia.

Element Tungsten, W, Transition Metal. Was produced by de Elhuyar brothers, students of Bergman in 1783. They named the new metal wolfram. After the mineral wolframite in which tungsten. Miners of 1416 centuries noticed that roasting of the ore tales the tin away, transferring it into slag.

The temporary name for this element offered by IUPAC was Unniloctium. After Otto Hahn proposed in August 1994. However, finally the final name Hassium.

Element Osmium, Os, Transition Metal. About the same time, Collet-Descotils suspected the existence of a new metal by the black powder formed by the dissolution of native platinum in aqua regia. The residue itself named osmiridium.

In honor the American chemist G. Seaborg was confirmed by IUPAC for the element 106.