chromium 55 | has symbol 55Cr | |
has nuclear spin I = 3/2- h/2π | |
has decay mode β- (2.603 Mev) | |
has decay mode γ | |
has half life 3.497 minutes | |
has number of nucleons 55 | |
has number of neutrons 31 | |
has atomic mass 54.940842 | |
is an instance of chromium | |
chromium | has lethal intake 70 mg kg-1 metal taken oraly in humans | |
has reserves 1 × 109 tonnes | |
has main mining area Turkey, South Africa, Zimbabwe, Russia, Philipipines | |
has mineral chromite, crocoite | |
has neutron scattering length 0.3635 × 10-12 cm | |
has electron affinity 64.3 kJ mol-1 from Cr to Cr- | |
has toxic intake 200 mg | |
has poisson's ratio 0.21 GPa | |
has bulk modulus 160.2 GPa | |
has rigidity modulus 115.3 GPa | |
has young's modulus 279 GPa | |
has mass magnetic susceptibility +4.45 × 10-8 kg-1 m3 for solid | |
has electrical resistivity 12.7 × 10-8 Ω m at 293 K | |
has thermal neutron capture cross section 3.1 barns | |
has longest lived isotope chromium 52 | |
has isotope mass range 45 to 57 | |
has number of isotopes 13 including nuclear isomers | |
has pronunciation kroh-mi-uhm | |
has name origin chroma = colour from Greek | |
has discovery location Paris, France | |
has abundance 5.13 × 105 in Sun relative to H = 1 × 1012 | |
has abundance 100 p.p.m. in Earth's crust | |
has abundance 1.8 × 10-4 p.p.m. in Atlantic surface seawater | |
has abundance 2.3 × 10-4 p.p.m. in deep Atlantic seawater | |
has abundance 1.5 × 10-4 p.p.m. in Pacific surface seawater | |
has abundance 2.5 × 10-4 p.p.m. in deep Pacific seawater | |
has specimen chips, chunks, crystallites or powder. Safe. | |
has world production 20000 tonnes year-1 for chromium metal | |
has world production 9.6 × 106 tonnes year-1 for chromite ore | |
has chief source chromite | |
has mass absorption coefficient 260 cm2 g-1 for CuKalpha X-ray diffraction | |
has mass absorption coefficient 31.1 cm2 g-1 for MoKalpha X-ray diffraction | |
has space group Im3m | |
has crystal cell dimension a = 288.46 pm | |
has crystal type b.c.c. | |
has atomic emission line 357.869 nm for Cr I (used in atom absorption spectrometry) | |
has atomic emission line 359.349 nm for Cr I | |
has atomic emission line 360.533 nm for Cr I | |
has atomic emission line 425.435 nm for Cr I (strong) | |
has atomic emission line 427.480 nm for Cr I | |
has atomic emission line 428.972 nm for Cr I | |
has atomic emission line 520.844 nm for Cr I | |
has term symbol 7S3 in ground state | |
has electron configuration [Ar]3d54s1 in ground state | |
has mass of element in person 14 mg for a 70 kg average person | |
has daily dietary intake 0.01 - 1.2 mg | |
has level in humans 0.006 - 0.11 mg dm-3 in blood | |
has level in humans 0.1 - 0.33 p.p.m. in bone | |
has level in humans 0.02 - 3.3 p.p.m. in liver | |
has level in humans 0.024 - 0.84 p.p.m. in muscle | |
has hazard poison by ingestion, suspected carcinogen, chromates are corrosive to tissue | |
has biological role essential to some species, including humans, stimulates metabolism | |
has linear expansion coefficient 6.2 × 10-6 K-1 | |
has thermal conductivity 93.7 W m-1 K-1 at 300 K | |
has molar volume 7.23 cm3 | |
has heat capacity 23.35 J K-1 mol-1 for solid at constant pressure 0.1 MPa at 298.15 K | |
has heat capacity 20.79 J K-1 mol-1 for gas at constant pressure 0.1 MPa at 298.15 K | |
has heat of vaporization 348.78 kJ mol-1 | |
has heat of fusion 15.3 kJ mol-1 | |
has boiling point 2945 K | |
has melting point 2130 ± 20 K | |
has electronegativity 1.66 Pauling | |
has relative atomic mass 51.9961 in units of 12C = 12.000 | |
has ionic radii 56 pm for Cr4+ | |
has ionic radii 64 pm for Cr3+ | |
has ionic radii 84 pm for Cr2+ | |
has atomic radii 125 pm | |
has number of protons 24 | |
has registry number 7440-47-3 for Chemical Abstracts System database | |
has density 7190 kg m-3 for solid at 293 K | |
has density 6460 kg m-3 for liquid at 2130 K melting point | |
has ocean oxidation state VI | |
has ocean residence time 10000 years | |
has atomic number 24 | |
reacts with HCL and H2SO4 by disolving | |
has discovery date 1780 | |
has discoverer Nicholas Louis Vauquelin | |
has uses alloys, plating and metal ceramics | |
has image | |
recycled oceanic element | has ocean concentration increasing with depth | |
chalcophile element | has occurrence in sulfide minerals | |
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 | |