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cobalt (Co, 4F9/2 in ground state) | ||||
subject | fact |
cobalt | has symbol Co | |
has lethal intake 80 mg kg-1 chloride ingested by rat | ||
has main mining area Zaire, Morocco, Sweden, Canada | ||
has mineral cobaltite, erythrite, glaucodot, linnaerite, skutterudite (smaltite) | ||
has neutron scattering length 0.278 × 10-12 cm | ||
has electron affinity 63.8 kJ mol-1 from Co to Co- | ||
has toxic intake 500 mg | ||
has poisson's ratio 0.32 GPa | ||
has bulk modulus 181.5 GPa | ||
has rigidity modulus 82 GPa | ||
has young's modulus 211 GPa | ||
has mass magnetic susceptibility ferromagnetic | ||
has electrical resistivity 6.24 × 10-8 Ω m at 293 K | ||
has covalent radii 116 pm | ||
has thermal neutron capture cross section 37.2 barns | ||
has longest lived isotope cobalt 59 | ||
has isotope mass range 35m to 64 | ||
has number of isotopes 17 including nuclear isomers | ||
has pronunciation koh-bolt | ||
has name origin kobald = goblin from German | ||
has discovery location Stockholm, Sweden | ||
has abundance 7.94 × 104 in Sun relative to H = 1 × 1012 | ||
has abundance 20 p.p.m. in Earth's crust | ||
has abundance 6.9 × 10-6 p.p.m. in Pacific surface seawater | ||
has abundance 1.1 × 10-6 p.p.m. in deep Pacific seawater | ||
has specimen foil, pieces, powder, rod and wire. Care ! | ||
has world production 17000 tonnes year-1 | ||
has chief source cobaltite, skutterudite | ||
has mass absorption coefficient 313 cm2 g-1 for CuKalpha X-ray diffraction | ||
has mass absorption coefficient 42.5 cm2 g-1 for MoKalpha X-ray diffraction | ||
has space group Fm3m for α-Co | ||
has space group P63/mmc for ε-Co | ||
has crystal cell dimension a = 354.41 pm for α-Co | ||
has crystal cell dimension a = 250.7, c = 406.9 pm for ε-Co | ||
has crystal type f.c.c. for α-Co | ||
has crystal type h.c.p. for ε-Co | ||
has atomic emission line 240.725 nm for Co I (used in atom absorption spectrometry) | ||
has atomic emission line 242.493 nm for Co I | ||
has atomic emission line 340.512 nm for Co I | ||
has atomic emission line 344.364 nm for Co I | ||
has atomic emission line 345.350 nm for Co I (strong) | ||
has atomic emission line 350.228 nm for Co I | ||
has atomic emission line 356.938 nm for Co I | ||
has term symbol 4F9/2 in ground state | ||
has electron configuration [Ar]3d74s2 in ground state | ||
has mass of element in person 3 mg for a 70 kg average person | ||
has daily dietary intake 0.005 - 1.8 mg | ||
has level in humans 0.0002 - 0.04 mg dm-3 in blood | ||
has level in humans 0.01 - 0.04 p.p.m. in bone | ||
has level in humans 0.06 - 1.1 p.p.m. in liver | ||
has level in humans 0.028 - 0.65 p.p.m. in muscle | ||
has hazard compounds have low toxicity when ingested, but produce vomiting. Suspected carcinogen. | ||
has biological role essential to most species, including humans | ||
has linear expansion coefficient 13.36 × 10-6 K-1 | ||
has thermal conductivity 100 W m-1 K-1 at 300 K | ||
has molar volume 6.62 cm3 | ||
has heat capacity 24.81 J K-1 mol-1 for solid at constant pressure 0.1 MPa at 298.15 K | ||
has heat capacity 23.020 J K-1 mol-1 for gas at constant pressure 0.1 MPa at 298.15 K | ||
has heat of vaporization 382.4 kJ mol-1 | ||
has heat of fusion 15.2 kJ mol-1 | ||
has boiling point 3143 K | ||
has melting point 1768 K | ||
has electronegativity 1.88 Pauling | ||
has relative atomic mass 58.93320 in units of 12C = 12.000 | ||
has ionic radii 64 pm for Co3+ | ||
has ionic radii 82 pm for Co2+ | ||
has atomic radii 125 pm | ||
has number of protons 27 | ||
has registry number 7440-48-4 for Chemical Abstracts System database | ||
has density 8900 kg m-3 for solid at 293 K | ||
has density 7670 kg m-3 for liquid at 293 K at melting point | ||
has ocean oxidation state II | ||
has ocean residence time 40 years | ||
has atomic number 27 | ||
reacts with dilute acids | ||
has discovery date 1735 | ||
has discoverer Georg Brandt | ||
has uses magnet alloys, ceramics, catalysts and paints | ||
has image | ||
has definition lustrous, silvery-blue, hard metal which is also ferromagnetic. Cobalt 60 is an important radioisotope | ||
is a kind of transition metal | ||
is a kind of siderophile element | ||
is a kind of scavenged oceanic element | ||
scavenged oceanic element | has ocean concentration decreasing with depth | |
siderophile element | has occurrence in planet metallic core and associated with iron | |
column grouped element | has group a column number in the table of the elements | |
element | is a part of Universe | |
has synonym atom | ||
particle | obeys uncertainty principle | |
has frequency inversely proportional to the wavelength | ||
has wavelength inversely proportional to its momentum | ||
has charge | ||
has mass | ||
physical object | has location or center of gravity | |
has angular momentum | ||
has velocity | ||
has momentum | ||
has temperature | ||
has volume | ||
has extent | ||
has material |
Kinds of cobalt :
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