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. Name: cobalt Symbol: Co Atomic number: 27 Relative atomic mass (Ar): 58.933194 (3) Standard state: solid at 298 K Appearance: lustrous, metallic, greyish. 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. 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. 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. The first attempts to smelt those ores for copper or silver failed, yielding simply powder (cobalt(II) oxide) instead. The free element, produced by reductive smelting, is a hard, lustrous, silver metal. As with nickel, cobalt is found in the Earths crust only in a chemically combined form, save for small deposits found in alloys of natural meteoric iron. The word cobalt is derived from the German kobalt, from kobold meaning "goblin", a superstitious term used for the ore of cobalt by miners. Cobalt is a chemical element with the symbol Co and atomic number 27. The forces of chemical bonding causes this repetition. A crystal lattice is a repeating pattern of mathematical points that extends throughout space. In metals, and in many other solids, the atoms are arranged in regular arrays called crystals. (Noble gases are unreactive.) I am a female, Fe Iron and Male man Therefore, I am Iron Man. Bar man says, 'We dont serve noble gases. Cobalt atoms have 27 electrons and 27 protons. sodium sodium sodium sodium sodium sodium sodium sodium BATMAN Argon walks into a bar. An atom of an element is most stable when its outer electron shell is completely filled or half-filled. The charge on an atom is related to its valence electrons or oxidation state. You can use this chart to predict whether or not an atom can bond with another atom. Discovery of cobaltCobalt has been used to color glass since the Bronze Age. A possible crystal structure of Cobalt is hexagonal close-packed structure. Cobalt is the first element in the ninth column of the periodic table. This is a chart of the most common charges for atoms of the chemical elements.
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