Lenhart,+Riley

COBOLT, Co Atomic mass: 58.93 Atomic Number: 27 [] Founder: Georg Brandt in 1739 How: Brandt was showing the people that the blue color of glass was not what they knew but a new element. [] Melting point: 1495 C Boiling point: 2927 C Density: 8800 [] protons: 27 electrons:27 neutrons:31 Valence electrons: 2 Oribital notation: 1s2 2s2 2p2 2p6 3s2 3p6 3d 7 4s1 Mining:cobalt ismined in nickel and copper mines and is never found naturally on its own Ores: cobaltite, erythrite, glaucodot, skutterudite Compounds: Fluorides- Difluoride, trifluoride, tetrafluoride Clorides: dichloride, trichloride, dichloride dehydrate Bromides: dibromide Iodides:diiodide Oxides: oxide, dicobalt trioxide, tricobalt tatraoxide Sulfides: sulphid, persulphide, trisulphate Selenides: selenide Tellurides: telluride Carbonyls: dicobalt octacarbonyl, tetracobalt dodevacarbonyl, Complexes: tricobalt diphosphate octahydrate, hexaaquocobalt dichride, tetraquocobalt difluoride, dibromide hexahydrate, sulphate heptahydrate Physical properties: bluish white, hard, brittle Chemical properties: magnetic Uses: in magnet steels along with stainless, jet turbines and gas turbine generators;Its compounds are used in paint pigments Chemical reactions:reactions with water produces cobalt oxide, and cobalt with halogens forms dibromide cobalt bromide. Cost: $200 per kilogram Facts: the element is part of the B12 votemin,also the compound cobalt-60 is used for medical treatments as well as preserving food. Body has about 1 milligram of cobalt. cobalt is named after the German word ‘kobald’ which actually means goblin

Citations:

Max Whitby, Theodore Gray Nick mann, ed. //Periodic Table//. N.p., 11 Feb. 2013. Web. 1 Mar. 2013. []. Milne, Jim, ed. //rcs//. N.p., 2013. Web. 4 Mar. 2013. [cobalt]. Gagnon, Steve, ed. //Jefferson Lab//. N.p., n.d. Web. 4 Mar. 2013. [itselemental/ele027.html].