![]() ![]() All other known metals (iron, copper, silver, gold, zinc, mercury, tin, lead and bismuth) had no recorded discoverers. Cobalt became the first metal to be discovered since the pre-historical period. Ferromagnetic transition metal, with the element symbol Co, and with the atomic number 27. He showed that compounds of cobalt metal were the source of the blue color in glass, which previously had been attributed to the bismuth found with cobalt. Stock Illustration: Cobalt on periodic table of the elements. Its interactive features allow you to easily view the atomic number along with other important properties of all 118 elements by clicking on the periodic chart. Swedish chemist Georg Brandt (1694–1768) is credited with discovering cobalt circa 1735, showing it to be a previously unknown element, distinct from bismuth and other traditional metals. The Fisher Scientific Interactive Period Table of Elements is a 21st century version of Mendeleev’s ingenious creation. Cobalt atoms have 27 electrons and 27 protons. Because the primary ores of cobalt always contain arsenic, smelting the ore oxidized the arsenic into the highly toxic and volatile arsenic oxide, adding to the notoriety of the ore. Cobalt is the first element in the ninth column of the periodic table. Cobalt is often synonymous with the color Cobalt Blue, however, pure cobalt ranges from a lustrous. It is found in various ores and is important as a trace element in the. As with nickel, cobalt is found in the Earths crust only in a chemically combined. Cobalts atomic number is 27 and its symbol is Co. Cobalt (chemical symbol Co, atomic number 27) is a hard, lustrous, silver-gray metal. Only minute quantities have been synthesized in laboratories. All known isotopes of meitnerium are radioactive with short half-lives. ![]() Iridium is mainly used as a hardening agent for platinum alloys. Rhodium can be used in jewelry as a shiny metal. The first attempts to smelt those ores for copper or silver failed, yielding simply powder (cobalt(II) oxide) instead. Cobalt is a chemical element with the symbol Co and atomic number 27. Cobalt is a metallic element that can be used to turn glass a deep blue color. The word cobalt is derived from the German kobalt, from kobold meaning "goblin", a superstitious term used for the ore of cobalt by miners. Discovery of cobaltCobalt has been used to color glass since the Bronze Age.
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