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Cobalt periodic table1/29/2024 ![]() Other alloys of cobalt are used in magnetic steels, stainless steels, and in jet turbine and gas turbine generators (where high-temperature strength is important). Stellite alloys (containing cobalt, chromium, and tungsten) are used for high-speed, heavy-duty, high temperature cutting tools, and dies. Naming: German: kobalt or kobold (evil spirit) Greek: cobalos (mines).ĭiscovery and first isolation:Georg Brandt (1735) in Stockholm Sweden Cobalt UsesĬobalt element can be magnetized (like iron), so it is used to make magnets, It is alloyed with iron, nickel and other metals to make Alnico (Al, Ni, Co), an alloy of unusual magnetic strength with many important uses. 2+ (aq) + 4 Cl – (aq) → 2- (aq) + 6 H 2O (I) Cobalt History 2+ (aq) + 4 Cl – (aq) → 2- (aq) + 6 H 2O (I)Ĭobalt metal dissolves slowly in dilute sulphuric acid, and forming aquated solutions containing the Co(II) ion together with hydrogen gas, he actual occurrence of Co(II) in aqueous solution is as the complex ion 2+.Ĭo (s) + H 2SO 4 (aq) → Co 2+ (aq) + SO 4 2- (aq) + H 2 (g)Ĭo(II) reacts with HCl(aq) under strongly acidic conditions, and forming tetrahedral chloro complexes: The metal also reacts with chloride and iodide, but as a synthetic pathway other reactions are used:Ĭo (s) + Cl 2 (g) → CoCl 2 (s) (Cobalt (II) chloride)Ĭo (s) + I 2 (s) → CoL 2 (s) (Cobalt (II) Iodide) The metal reacts with bromine, and forming:Ĭo (s) + Br 2 (I) → CoBr 2 (s) (Cobalt (II) bromide) Water has little effect upon cobalt metal, The reaction between red hot cobalt metal and steam produces cobalt(II) oxide, CoO. If the reaction is carried out above 900☌, the cobalt(II) oxide CoO is formed: However, on heating the oxide Co 3O 4 is formed: Isotopes: 56 Co 57 Co 58 Co 59 Co 60 Co Isotope ![]() Hexagonal Close Packed (HCP) Reactivity of Cobalt ElementĮlectron affinity: 63.7 kJ/mol Nuclear Properties of Cobalt Ionization energies: 1st: 760.4 kJ.mol 2nd: 1648 kJ/mol 3rd: 3232 kJ/molĬovalent radius: 126☓ pm (Low spin), 150☗ pm (High spin)Ĭrystal structure: Hexagonal close packed The ionization potential of an atom: 7.81 Sound Speed: 4720 m/s Atomic Properties of Cobalt Element ![]() Magnetic susceptibility (x mol): +1860×10 -6 cm 3/mol Physical Properties of Cobaltĭensity: 8.90 g/cm 3 (In solid) 8.86 g/cm 3 (In Liquid at M.P) Thermal conductivity: 100 W/(m∙K) Electrical properties of CobaltĪ Electrical type: Conductor Magnetic Properties of Cobalt ElementĬurie point: 1394 K (1120.85 oC, 2049.53 oF) (above which Ferromagnetism vanishes) Cobalt Electron Configuration Thermal Properties of Cobalt Elementĭebye temperature: 385 K (111.85 oC, 233.33 oF)
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