Astronomy View all facts Glossary Help |
physical object > natural object > particle > element > metallic element > alkali earth metal > calcium |
calcium (Ca, 1S0 in ground state) | ||||
subject | fact |
calcium | has symbol Ca | |
has lethal intake 6.45 grams kg-1 in carbonate form for rat | ||
has reserves almost unlimited | ||
has main mining area common everywhere | ||
has mineral anhydrite, aragonite, calcite, dolomite, gypsum, shortite, vaterite | ||
has neutron scattering length 0.476 × 10-12 cm | ||
has electron affinity -186 kJ mol-1 from Ca to Ca- | ||
has toxic intake non-toxic | ||
has poisson's ratio 0.31 GPa | ||
has bulk modulus 17.2 GPa | ||
has rigidity modulus 7.9 GPa | ||
has young's modulus 19.6 GPa | ||
has mass magnetic susceptibility +1.4 × 10-8 kg-1 m3 for solid | ||
has electrical resistivity 3.43 × 10-8 Ω m at 293 K | ||
has covalent radii 174 pm | ||
has thermal neutron capture cross section 0.43 barns | ||
has longest lived isotope | ||
has isotope mass range 36 to 51 | ||
has number of isotopes 16 including nuclear isomers | ||
has pronunciation kal-sium | ||
has name origin calx = lime from Latin | ||
has discovery location London, England | ||
has abundance 2.24 × 106 in Sun relative to H = 1 × 1012 | ||
has abundance 41000 p.p.m. in Earth's crust | ||
has abundance 390 p.p.m. in Atlantic surface seawater | ||
has abundance 430 p.p.m. in deep Atlantic seawater | ||
has abundance 390 p.p.m. in Pacific surface seawater | ||
has abundance 440 p.p.m. in deep Pacific seawater | ||
has specimen granules, pieces or turings. Care ! | ||
has world production 2000 tonnes year-1 for calcium metal | ||
has world production 112 × 106tonnes year-1 for lime, CaO | ||
has chief source calcite, dolomite, gypsum (used in cement and plaster) anhydrite (used to make H2SO4) | ||
has mass absorption coefficient 162 cm2 g-1 for CuKα X-ray diffraction | ||
has mass absorption coefficient 18.3 cm2 g-1 for MoKα X-ray diffraction | ||
has space group | ||
has crystal cell dimension a = pm | ||
has crystal type | ||
has atomic emission line 239.856 nm for Ca I | ||
has atomic emission line 317.933 nm for Ca II | ||
has atomic emission line 373.690 nm for Ca II | ||
has atomic emission line 393.366 nm for Ca II (strong) | ||
has atomic emission line 393.847 nm for Ca II | ||
has atomic emission line 422.673 nm for Ca I (used in atom absorption spectrometry) | ||
has term symbol 1S0 in ground state | ||
has electron configuration [Ar]4s2 in ground state | ||
has mass of element in person 1.00 kg for a 70 kg average person | ||
has daily dietary intake 600 - 1400 mg | ||
has level in humans 60.5 mg dm-3 in blood | ||
has level in humans 170000 p.p.m. in bone | ||
has level in humans 100 - 360 p.p.m. in liver | ||
has level in humans 140 - 700 p.p.m. in muscle | ||
has hazard calcium compounds are only toxic via the other elements they contain | ||
has biological role essential to all species | ||
has linear expansion coefficient 22 × 10-6 K-1 | ||
has thermal conductivity 200 W m-1 K-1 at 300 K | ||
has molar volume 25.86 cm3 | ||
has heat capacity 25.31 J K-1 mol-1 for solid α form at constant pressure 0.1 MPa at 298.15 K | ||
has heat capacity 20.786 J K-1 mol-1 for gas at constant pressure 0.1 MPa at 298.15 K | ||
has heat of vaporization 149.95 kJ mol-1 | ||
has heat of fusion 9.33 kJ mol-1 | ||
has boiling point 1757 K | ||
has melting point 1112 K | ||
has electronegativity 1.00 Pauling | ||
has relative atomic mass 40.078 in units of 12C = 12.000 | ||
has ionic radii 106 pm for Ca2+ | ||
has atomic radii 197 pm for α-form | ||
has number of protons 20 | ||
has registry number 7440-70-2 for Chemical Abstracts System database | ||
has density 1550 kg m-3 for solid at 293 K | ||
has density 1365 kg m-3 for liquid at 1112 K melting point | ||
has synthesis mechanism heat calcium oxide (CaO) with aluminium metal in vacuum | ||
has ocean oxidation state II | ||
has ocean residence time 1 × 106 years | ||
has atomic number 20 | ||
reacts with oxygen and water but soon forms a thin protective oxide-nitride film preventing further corrosion | ||
has discovery date 1808 (isolated) | ||
has discoverer Sir Humphry Davy | ||
has uses alloys and in the manufacture of zirconium, thorium, and uranium and the rare earth metals | ||
has uses CaO used in metallurgy, water treatment, chemicals industry, cement, etc | ||
has image | ||
has definition silvery-white, relatively soft metal | ||
is a kind of alkali earth metal | ||
is a kind of lithophile element | ||
is a kind of recycled oceanic element | ||
alkali earth metal | has hardness malleable, extrudable and machinable | |
recycled oceanic element | has ocean concentration increasing with depth | |
lithophile element | has occurrence in silicate materials such as igneous rocks | |
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 calcium :
Next alkali earth metal: magnesium Up: alkali earth metal, lithophile element, recycled oceanic element Previous alkali earth metal: beryllium