Cobalt, 27Co
Àdàkọ:Infobox element/symbol-to-top-image/alt
Cobalt
Pípè /ˈkbɒlt/[1]
Ìhànsójúhard lustrous gray metal
Ìwúwo átọ̀mù Ar, std(Co)58.933194(3)Àdàkọ:CIAAW2013
nọ́mbà ìsújọCo:
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 ẹ́límẹ́ntìÀdàkọ:Infobox element/category format
Ìtò ẹ̀lẹ́ktrọ́nùÀdàkọ:Infobox element/symbol-to-electron-configuration
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
Atomic properties
Oxidation statesÀdàkọ:Infobox element/symbol-to-oxidation-state
ElectronegativityPauling scale: 1.88
energies
Atomic radiusempirical: 125 pm
Covalent radius126±3 (low spin), 150±7 (high spin) pm
Àdàkọ:Infobox element/spectral lines
Other properties
Natural occurrenceÀdàkọ:Infobox element/symbol-to-occurrence
Crystal structureÀdàkọ:Infobox element/crystal structure
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
Àdàkọ:Infobox element/isotopes table
Àdàkọ:Category-inline
| references



ItokasiÀtúnṣe

  1. Oxford English Dictionary, 2nd Edition 1989.
  2. Choi, Hyungsoo (2003). "Liquid Cobalt (I) Hydride Complexes as Precursors for Chemical Vapor Deposition". Chemistry of Materials 15: 3121. doi:10.1021/cm030100e.