Tantalum
compared the oxides derived from both columbium— columbite , with a density 5.918 g/cm 3 , and tantalum— tantalite , with a density 7.935 g/cm 3 , and concluded that the two oxides, despite their difference in measured density, were identical. He decided to keep the name tantalum . [ 4
Niobium
Niobium has physical and chemical properties similar to those of the element tantalum , and the two are therefore difficult to distinguish. The English chemist Charles Hatchett reported a new element similar to tantalum in 1801, and named it columbium. In 1809, the English chemist William
Dianium
analysed the minerals tantalite and columbite to better understand the chemistry of niobium and tantalum . The similar reactivity of niobium and tantalum hindered preparation of pure samples and therefore several new elements were proposed, which were later found to be mixtures of niobium
List of chemical elements naming controversies
( Cb ), [ 3 ] [ citation needed ] but after the publication of the identity of columbium with tantalum by William Hyde Wollaston the claims of discovery of Hattchet were refused. [ 4 ] Heinrich Rose discovered that tantalite contained a element similar to tantalum and named it Niobium
Ilmenium
The differences between tantalum and niobium and the fact that no other similar element was present, were unequivocally demonstrated in 1864 by Christian Wilhelm Blomstrand , [ 2 ] and Henri Etienne Sainte-Claire Deville , as well as Louis J. Troost , who determined the formulas of some of
Hafnium
Hafnium is used in filaments, electrodes, and some semiconductor fabrication processes for integrated circuits at 45 nm and smaller feature lengths. Its large neutron capture cross-section makes hafnium a good material for neutron absorption in control rods in nuclear power plants . Some
Yttrium
In 1787, Carl Axel Arrhenius found a new mineral near Ytterby in Sweden and named it ytterbite , after the village. Johan Gadolin discovered yttrium's oxide in Arrhenius' sample in 1789, [ 3 ] and Anders Gustaf Ekeberg named the new oxide yttria . Elemental yttrium was first isolated in
Zinc
The element was probably named by the alchemist Paracelsus after the German word Zinke . German chemist Andreas Sigismund Marggraf is normally given credit for discovering pure metallic zinc in 1746. Work by Luigi Galvani and Alessandro Volta uncovered the electrochemical properties of
Molybdenum
It has a melting point of 2,623 °C (4,753 °F); of the naturally occurring elements, only tantalum , osmium , rhenium , tungsten and carbon have higher melting points. [ 3 ] Molybdenum burns only at temperatures above 600 °C (1,112 °F). [ 4 ] It has one of the lowest coefficient
Pelopium
The differences between tantalum and niobium and the fact that no other similar element was present were unequivocally demonstrated in 1864 by Christian Wilhelm Blomstrand , [ 4 ] and Henri Etienne Sainte-Claire Deville , as well as Louis J. Troost , who determined the formulas of some of
