ഫലകം:Infobox cobalt

വിക്കിപീഡിയ, ഒരു സ്വതന്ത്ര വിജ്ഞാനകോശം.
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കൊബാൾട്ട്,  27Co
cobalt chips
General properties
Pronunciation/ˈkbɒlt/ (About this soundശ്രവിക്കുക)[1]
Appearancemetallic with gray tinge
Standard atomic weight (Ar, standard)58.933194(3)[2]
കൊബാൾട്ട് in the periodic table
[[Hydrogen|Hydrogen [[Helium|Helium
[[Lithium|Lithium [[Beryllium|Beryllium [[Boron|Boron [[Carbon|Carbon [[Nitrogen|Nitrogen [[Oxygen|Oxygen [[Fluorine|Fluorine [[Neon|Neon
[[Sodium|Sodium [[Magnesium|Magnesium [[Aluminium|Aluminium [[Silicon|Silicon [[Phosphorus|Phosphorus [[Sulfur|Sulfur [[Chlorine|Chlorine [[Argon|Argon
[[Potassium|Potassium [[Calcium|Calcium [[Scandium|Scandium [[Titanium|Titanium [[Vanadium|Vanadium [[Chromium|Chromium [[Manganese|Manganese [[Iron|Iron [[Cobalt|Cobalt [[Nickel|Nickel [[Copper|Copper [[Zinc|Zinc [[Gallium|Gallium [[Germanium|Germanium [[Arsenic|Arsenic [[Selenium|Selenium [[Bromine|Bromine [[Krypton|Krypton
[[Rubidium|Rubidium [[Strontium|Strontium [[Yttrium|Yttrium [[Zirconium|Zirconium [[Niobium|Niobium [[Molybdenum|Molybdenum [[Technetium|Technetium [[Ruthenium|Ruthenium [[Rhodium|Rhodium [[Palladium|Palladium [[Silver|Silver [[Cadmium|Cadmium [[Indium|Indium [[Tin|Tin [[Antimony|Antimony [[Tellurium|Tellurium [[Iodine|Iodine [[Xenon|Xenon
[[Caesium|Caesium [[Barium|Barium [[Lanthanum|Lanthanum [[Cerium|Cerium [[Praseodymium|Praseodymium [[Neodymium|Neodymium [[Promethium|Promethium [[Samarium|Samarium [[Europium|Europium [[Gadolinium|Gadolinium [[Terbium|Terbium [[Dysprosium|Dysprosium [[Holmium|Holmium [[Erbium|Erbium [[Thulium|Thulium [[Ytterbium|Ytterbium [[Lutetium|Lutetium [[Hafnium|Hafnium [[Tantalum|Tantalum [[Tungsten|Tungsten [[Rhenium|Rhenium [[Osmium|Osmium [[Iridium|Iridium [[Platinum|Platinum [[Gold|Gold [[Mercury (element)|Mercury (element) [[Thallium|Thallium [[Lead|Lead [[Bismuth|Bismuth [[Polonium|Polonium [[Astatine|Astatine [[Radon|Radon
[[Francium|Francium [[Radium|Radium [[Actinium|Actinium [[Thorium|Thorium [[Protactinium|Protactinium [[Uranium|Uranium [[Neptunium|Neptunium [[Plutonium|Plutonium [[Americium|Americium [[Curium|Curium [[Berkelium|Berkelium [[Californium|Californium [[Einsteinium|Einsteinium [[Fermium|Fermium [[Mendelevium|Mendelevium [[Nobelium|Nobelium [[Lawrencium|Lawrencium [[Rutherfordium|Rutherfordium [[Dubnium|Dubnium [[Seaborgium|Seaborgium [[Bohrium|Bohrium [[Hassium|Hassium [[Meitnerium|Meitnerium [[Darmstadtium|Darmstadtium [[Roentgenium|Roentgenium [[Copernicium|Copernicium [[Nihonium|Nihonium [[Flerovium|Flerovium [[Moscovium|Moscovium [[Livermorium|Livermorium [[Tennessine|Tennessine [[Oganesson|Oganesson
-

Co

Rh
ഇരുമ്പ് കൊബാൾട്ട്നിക്കൽ
Atomic number (Z)27
Groupgroup 9
Periodperiod 4
Blockd-block
Electron configuration[Ar] 3d7 4s2
Electrons per shell
2, 8, 15, 2
Physical properties
Colora grayish silver
Melting point1768 K ​(1495 °C, ​2723 °F)
Boiling point3200 K ​(2927 °C, ​5301 °F)
Density (near r.t.)8.90 g/cm3
when liquid (at m.p.)7.75 g/cm3
Heat of fusion16.06 kJ/mol
Heat of vaporization377 kJ/mol
Molar heat capacity24.81 J/(mol·K)
Vapor 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, +1, +2, +3, +4, +5[3] (an amphoteric oxide)
ElectronegativityPauling scale: 1.88
Ionization energies
Atomic radiusempirical: 135 pm
calculated: 152 pm
Covalent radius126 pm
Color lines in a spectral range
Spectral lines of കൊബാൾട്ട്
Other properties
Crystal structurehexagonal
Hexagonal crystal structure for കൊബാൾട്ട്
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 കൊബാൾട്ട്
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- 2.824 60Ni
| references
  1. Oxford English Dictionary, 2nd Edition 1989.
  2. Meija, J.; മറ്റുള്ളവർക്കൊപ്പം. (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. Greenwood, Norman N.; Earnshaw, Alan (1997). Chemistry of the Elements (2nd ed.). Butterworth-Heinemann. pp. 1117–1119. ISBN 0-08-037941-9.
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