Rhenium
Origin of the name The name of the element comes from the Latin Rhenus – the name of the river Rhine in Germany. History The existence of rhenium was predicted by D.I. Mendeleev (“tri-manganese”) in 1871, by analogy with properties of the elements in the same group of the periodic system, but the term “two-manganese” […]
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Germanium
Germanium, Ge (from the Latin. Germania – Germany* a. Germanium; n. Germanium; f. Germanium; i. Germanio) – a chemical element of the fourth group of the periodic system, atomic number 32, atomic mass 72.59. Natural germanium consists of 4 stable isotopes 70Ge (20.55%), 72Ge (27.37%), 73Ge (7.67%), 74Ge (36.74%) and one radioactive 76Ge (7,67%) with […]
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Rhodium
Rhodium is one of the rarest and most valuable precious metals of the platinum group, discovered at the beginning of the 19th century and named “rose” in translation from ancient Greek. The scientist, who first discovered rhodium, managed to isolate bright pink powder in native platinum solution, which was transformed into a heavy metal of […]
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Ruthenium
Ruthenium is an element of the eighth group of the fifth period of the periodic table of chemical elements, its atomic number is 44. Elementary ruthenium is a transitional metal of silver color. It refers to platinum metals. History Discovered by the professor of Kazan University, Karl Klaus in 1844, who published a large article […]
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Indium
Properties Indium is a silvery-white soft metal. Its crystal structure is tetragonal face-centered with the following parameters: a=0.4583pm, c=0.4936pm. The density of indium is 7310 kg/m3. Indium is malleable, its melting point is 156.78°С, boiling point is 2024°С; specific heat at 0-150°С 234.461 J/kg•К, Young ‘s modulus – 11GPa, Brinell hardness – 9MPa. The oxidation […]
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