Cobalt

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Cobalt, 27Co
cobalt chips
Cobalt
Pípè /ˈkbɒlt/[1]
Ìhànsójúhard lustrous gray metal
Ìwúwo átọ̀mù Ar, std(Co)58.933194(3)[2]
Cobalt ní orí tábìlì àyè
Hydrogen Helium
Lithium Beryllium Boron Carbon Nitrogen Oxygen Fluorine Neon
Sodium Magnesium Aluminium Silicon Phosphorus Sulfur Chlorine Argon
Potassium Calcium Scandium Titanium Vanadium Chromium Manganese Iron Cobalt Nickel Copper Zinc Gallium Germanium Arsenic Selenium Bromine Krypton
Rubidium Strontium Yttrium Zirconium Niobium Molybdenum Technetium Ruthenium Rhodium Palladium Silver Cadmium Indium Tin Antimony Tellurium Iodine Xenon
Caesium Barium Lanthanum Cerium Praseodymium Neodymium Promethium Samarium Europium Gadolinium Terbium Dysprosium Holmium Erbium Thulium Ytterbium Lutetium Hafnium Tantalum Tungsten Rhenium Osmium Iridium Platinum Gold Mercury (element) Thallium Lead Bismuth Polonium Astatine Radon
Francium Radium Actinium Thorium Protactinium Uranium Neptunium Plutonium Americium Curium Berkelium Californium Einsteinium Fermium Mendelevium Nobelium Lawrencium Rutherfordium Dubnium Seaborgium Bohrium Hassium Meitnerium Darmstadtium Roentgenium Copernicium Nihonium Flerovium Moscovium Livermorium Tennessine Oganesson
-

Co

Rh
ironcobaltnickel
Nọ́mbà átọ̀mù (Z)27
Ẹgbẹ́group 9
Àyèàyè 4
Àdìpọ̀Àdìpọ̀-d
Ẹ̀ka ẹ́límẹ́ntì  Transition metal
Ìtò ẹ̀lẹ́ktrọ́nù[Ar] 3d7 4s2
Iye ẹ̀lẹ́ktrọ́nù lórí ìpele kọ̀ọ̀kan2, 8, 15, 2
Àwọn ohun ìní ara
metallic gray
Ìfarahàn at STPÀdàkọ:Infobox element/symbol-to-phase
Ìgbà ìyọ́1768 K ​(1495 °C, ​2723 °F)
Ígbà ìhó3200 K ​(2927 °C, ​5301 °F)
Kíki (near r.t.)8.90 g/cm3
when liquid (at m.p.)7.75 g/cm3
Heat of fusion16.06 kJ/mol
Heat of 377 kJ/mol
Molar heat capacity24.81 J/(mol·K)
 pressure
P (Pa) 1 10 100 1 k 10 k 100 k
at T (K) 1790 1960 2165 2423 2755 3198
Atomic properties
Oxidation states−3, −1, 0, +1, +2, +3, +4, +5[3] Àdàkọ:Infobox element/symbol-to-oxidation-state/comment
ElectronegativityPauling scale: 1.88
energies
Atomic radiusempirical: 125 pm
Covalent radius126±3 (low spin), 150±7 (high spin) pm
Color lines in a spectral range
Spectral lines of cobalt
Other properties
Natural occurrenceprimordial
Crystal structurehexagonal
Hexagonal crystal structure for cobalt
Speed of sound thin rod4720 m/s (at 20 °C)
Thermal expansion13.0 µm/(m·K) (at 25 °C)
Thermal conductivity100 W/(m·K)
Electrical resistivity62.4 n Ω·m (at 20 °C)
Magnetic orderingferromagnetic
Young's modulus209 GPa
Shear modulus75 GPa
Bulk modulus180 GPa
Poisson ratio0.31
Mohs hardness5.0
Vickers hardness1043 MPa
Brinell hardness700 MPa
CAS Number7440-48-4
Main isotopes of cobalt
Iso­tope Abun­dance Half-life (t1/2) Decay mode Pro­duct
56Co syn 77.27 d ε 4.566 56Fe
57Co syn 271.79 d ε 0.836 57Fe
58Co syn 70.86 d ε 2.307 58Fe
59Co 100% 59Co is stable with 32 neutrons
60Co syn 5.2714 years β,γ,γ 2.824 60Ni
Àdàkọ:Category-inline
| references



Itokasi[àtúnṣe | àtúnṣe àmìọ̀rọ̀]

  1. Oxford English Dictionary, 2nd Edition 1989.
  2. Meija, Juris; Coplen, Tyler B.; Berglund, Michael; Brand, Willi A.; De Bièvre, Paul; Gröning, Manfred; Holden, Norman E.; Irrgeher, Johanna et al. (2016). "Atomic weights of the elements 2013 (IUPAC Technical Report)". Pure and Applied Chemistry 88 (3): 265–91. doi:10.1515/pac-2015-0305. 
  3. Àdàkọ:Greenwood&Earnshaw2nd
  4. Choi, Hyungsoo (2003). "Liquid Cobalt (I) Hydride Complexes as Precursors for Chemical Vapor Deposition". Chemistry of Materials 15: 3121. doi:10.1021/cm030100e.