Cobalt Company Profile

Aggregated data from the web about Cobalt
Company Name Cobalt
Website https://en.wikipedia.org
Snippet Cobalt is a chemical element with the symbol Co and atomic number 27. Like nickel, cobalt is found in the Earth's crust only in a chemically combined form, save for small deposits found in alloys of natural meteoric iron.The free element, produced by reductive smelting, is a hard, lustrous, silver-gray metal.. Cobalt-based blue pigments (cobalt blue) have been used since ancient times for ...
56Co syn
57Co syn
58Co syn
59Co 100%
60Co syn
Block d-block
Group group 9
P (Pa) Vapor pressureP (Pa)1101001 k10 k100 kat T (K)179019602165242327553198
Period period 4
at T (K) 1790
Iso­tope Iso­topeAbun­danceHalf-life (t1/2)Decay modePro­duct56Cosyn77.27 dε56Fe57Cosyn271.74 dε57Fe58Cosyn70.86 dε58Fe59Co100%stable60Cosyn5.2714 yβ−, γ60Ni
Appearance hard lustrous bluish gray metal
CAS Number 7440-48-4
Bulk modulus 180 GPa
Phase at STP solid
Atomic radius empirical: 125 pm
Boiling point 3200 K ​(2927 °C, ​5301 °F)
Melting point 1768 K ​(1495 °C, ​2723 °F)
Mohs hardness 5.0
Poisson ratio 0.31
Pronunciation /ˈkoʊbɒlt/ (listen)[1]
Shear modulus 75 GPa
Heat of fusion 16.06 kJ/mol
Covalent radius Low spin: 126±3 pmHigh spin: 150±7 pm
Young's modulus 209 GPa
Brinell hardness 470–3000 MPa
Oxidation states −3, −1, 0, +1, +2, +3, +4, +5[3] (an amphoteric oxide)
Vickers hardness 1043 MPa
Atomic number (Z) 27
Crystal structure ​hexagonal close-packed (hcp)
Electronegativity Pauling scale: 1.88
Magnetic ordering ferromagnetic
Thermal expansion 13.0 µm/(m⋅K) (at 25 °C)
Natural occurrence primordial
Density (near r.t.) 8.90 g/cm3
Electrons per shell 2, 8, 15, 2
Ionization energies 1st: 760.4 kJ/mol, 2nd: 1648 kJ/mol, 3rd: 3232 kJ/mol, (more)
Molar heat capacity 24.81 J/(mol·K)
Heat of vaporization 377 kJ/mol
Thermal conductivity 100 W/(m⋅K)
when liquid (at m.p.) 8.86 g/cm3
Electrical resistivity 62.4 nΩ⋅m (at 20 °C)
Electron configuration [Ar] 3d7 4s2
Speed of sound thin rod 4720 m/s (at 20 °C)
Discovery and first isolation Georg Brandt (1735)
Standard atomic weight.mw-parser-output .nobold{font-weight:normal} Ar, std(Co) 58.933194(3)[2]

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