Template:Infobox cobaut

Cobaut, ₂₇Co

Cobaut
Pronunciation	i/ˈkoʊbɒlt/
Appearance	haird lustrous gray metal
Standard atomic weight Ar, std(Co)	7001589331940000000♠58.933194(3)
Cobaut in the periodic cairt
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 Airn Cobalt Nickel Capper Zinc Gallium Germanium Arsenic Selenium Bromine Krypton Rubidium Strontium Yttrium Zirconium Niobium Molybdenum Technetium Ruthenium Rhodium Palladium Siller (element) 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 Gowd Mercur (element) Thallium Leid (element) 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 Ununtrium Flerovium Ununpentium Livermorium Ununseptium Ununoctium - ↑ Co ↓ Rh iron ← cobaut → nickel
Atomic nummer (Z)	27
Group	group 9
Period	period 4
Block	d-block
Element category	Transeetion metal
Electron confeeguration	[Ar] 3d7 4s2
Electrons per shell	2, 8, 15, 2
Pheesical properties
Colour	metallic gray
Phase at STP	solit
Meltin pynt	1768 K ​(1495 °C, ​2723 °F)
Bylin pynt	3200 K ​(2927 °C, ​5301 °F)
Density (near r.t.)	8.90 g/cm3
when liquid (at m.p.)	7.75 g/cm3
Heat o fusion	16.06 kJ/mol
Heat o vapourisation	377 kJ/mol
Molar heat capacity	24.81 J/(mol·K)
Vapour pressur 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 (an amphoteric oxide)
Electronegativity	Pauling scale: 1.88
Ionisation energies	(more)
Atomic radius	empirical: 125 pm
Covalent radius	126±3 (law spin), 150±7 (heich spin) pm
Colour lines in a spectral range Spectral lines o cobaut
Ither properties
Naitural occurrence	primordial
Creestal structur	​hexagonal close-packed (hcp)
Speed o soond thin rod	4720 m/s (at 20 °C)
Thermal expansion	13.0 µm/(m·K) (at 25 °C)
Thermal conductivity	100 W/(m·K)
Electrical resistivity	62.4 n Ω·m (at 20 °C)
Magnetic orderin	ferromagnetic
Young's modulus	209 GPa
Shear modulus	75 GPa
Bulk modulus	180 GPa
Poisson ratio	0.31
Mohs haurdness	5.0
Vickers haurdness	1043 MPa
Brinell haurdness	700 MPa
CAS Nummer	7440-48-4
History
Diskivery	Georg Brandt (1732)
Main isotopes o cobaut
Iso­tope Abun­dance Hauf-life (t1/2) Decay mode Pro­duct 56Co syn 77.27 d ε 56Fe 57Co syn 271.79 d ε 57Fe 58Co syn 70.86 d ε 58Fe 59Co 100% stable 60Co syn 5.2714 y β−, γ 60Ni

style="text-align:left"| data m.p. cat
	in	calc from C	diff	report	ref
C	1495	—	—
K	1768	1768	0
F	2723	2723	0
WD	2719 !2719 Fahrenheit 1768 kelvin 1495 Celsius
input	C: 1495, K: 1768, F: 2723
comment

style="text-align:left"| data b.p. cat
	in	calc from C	diff	report	ref
C	2927	—	—
K	3200	3200	0
F	5301	5301	0
WD	5612 !5612 Fahrenheit 3200 kelvin 2927 Celsius
input	C: 2927, K: 3200, F: 5301
comment

References

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