Cobalt ore density8/10/2023 ![]() 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. Cobalt Symbol: Co Atomic Number: 27 Atomic Weight: 58.933 Classification: Transition metal Phase at Room Temperature: Solid Density: 8.9 grams per cm. Significant differences in ore properties (geochemistry, mineralogy, alteration and physical properties) exist between cobalt-containing deposits, as well as within a single deposit, which can. 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 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 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. 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.
0 Comments
Leave a Reply.AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |