Search results
Results from the WOW.Com Content Network
Rhenium is a chemical element; it has symbol Re and atomic number 75. It is a silvery-gray, heavy, third-row transition metal in group 7 of the periodic table. With an estimated average concentration of 1 part per billion (ppb), rhenium is one of the rarest elements in the Earth's crust. It has one of the highest melting and boiling points of ...
Rhenium was the last element to be discovered having a stable isotope. The existence of a yet undiscovered element at this position in the periodic table had been predicted by Henry Moseley in 1914. In 1925 they reported that they detected the element in platinum ore and in the mineral columbite. They also found rhenium in gadolinite and ...
In 1925 in Germany, Walter Noddack, Ida Tacke, and Otto Berg reported that they detected the element in platinum ore and in the mineral columbite. They also found rhenium in gadolinite and molybdenite. [5] In 1928 they were able to extract 1 gram of the element by processing 660 kg of molybdenite.
An ORICL class recently learned these facts while listening to a fascinating history of element discovery involving ORNL presented by Jim Roberto. ... a German chemist and co-discoverer of rhenium ...
They named the elements rhenium in respect of Ida's birthplace, and masurium in honor of his. [7] After scientists were sceptical of their results, the Noddack's began to perform more experiments to confirm their discoveries. Only rhenium's discovery was confirmed. They were unable to isolate element 43 and their results were not reproducible. [7]
Group 7, numbered by IUPAC nomenclature, is a group of elements in the periodic table.It contains manganese (Mn), technetium (Tc), rhenium (Re) and bohrium (Bh). This group lies in the d-block of the periodic table, and are hence transition metals.
Masataka Ogawa (小川 正孝, Ogawa Masataka, 21 February 1865 – 11 July 1930 [1]) was a Japanese chemist mainly known for the claimed discovery of element 43 (later known as technetium), which he named nipponium. In fact, he had discovered, but misidentified, element 75 (later called rhenium). [2] [3]
Scientists analyzed artifacts from Tycho Brahe’s lab and found tungsten, an element unknown in his time, rewriting our understanding of historical alchemy.