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physical object > natural object > particle > element > column grouped element > inert gas > helium > helium 6
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helium 6
(6He)
subjectfact 
helium 6has symbol 6He2001-09-27 09:28:50.0
has nuclear spin I = 0+2001-09-27 09:28:50.0
has decay mode β- (3.5010 Mev) 100 %2001-09-27 09:28:50.0
has decay mode γ2001-09-27 09:28:50.0
has half life 0.807 seconds2001-09-27 09:28:50.0
has number of nucleons 62001-09-27 09:28:50.0
has number of neutrons 42001-09-27 09:28:50.0
has atomic mass 6.0188862001-09-27 09:28:50.0
is an instance of heliumhas URL: http://nucleardata.nuclear.lu.se/nucleardata/toi/nuclide.asp?iZA=20006, 2001-09-27 09:28:50.0
heliumhas stable isotope helium 3, helium 42001-09-27 09:28:50.0
has lethal intake non-toxic2001-09-27 09:28:49.0
has reserves 3.7 × 109 tonnes in Earth's atmosphere2001-09-27 09:28:50.0
has mineral present in some minerals2001-09-27 09:28:50.0
has neutron scattering length 0.326 × 10-12 cm2001-09-27 09:28:49.0
has electron affinity 0.0 kJ mol-1 from to -2001-09-27 09:28:49.0
has toxic intake non-toxic2001-09-27 09:28:49.0
has mass magnetic susceptibility -5.9 × 10-9 kg-1 m3 for gas2001-09-27 09:28:49.0
has van der Waals radii 120 pm2001-09-27 09:28:49.0
has thermal neutron capture cross section 0.007 barns2001-09-27 09:28:49.0
has longest lived isotope helium 42001-09-27 09:28:50.0
has isotope mass range 3 to 8 except 72001-09-27 09:28:50.0
has number of isotopes 5 including nuclear isomers2001-09-27 09:28:50.0
has pronunciation heel-iuhm2001-09-27 09:28:50.0
has name origin helios = sun from Greek2001-09-27 09:28:50.0
has discovery location England2001-09-27 09:28:50.0
has abundance 6.31 × 1010 in Sun relative to H = 1 × 10122001-09-27 09:28:50.0
has abundance 0.008 p.p.m. in Earth's crust2001-09-27 09:28:50.0
has abundance 5.2 p.p.m. by volume in Earth's atmosphere2001-09-27 09:28:50.0
has abundance 4 × 10-6 p.p.m. in seawater2001-09-27 09:28:50.0
has specimen small pressurized canisters. Safe.2001-09-27 09:28:50.0
has world production 4500 tonnes year-12001-09-27 09:28:50.0
has chief source natural gas which may contain up to 7% helium2001-09-27 09:28:50.0
has mass absorption coefficient 0.383 cm2 g-1 for CuKα X-ray diffraction2001-09-27 09:28:49.0
has mass absorption coefficient 0.207 cm2 g-1 for MoKα X-ray diffraction2001-09-27 09:28:49.0
has space group P63/mmc for α-He at 1.15 K, 6.69 MPa2001-09-27 09:28:49.0
has space group Fm3m for β-He at 16K, 127 MPa2001-09-27 09:28:49.0
has space group Im3m for γ-He at 1.73 K, 2.94 MPa2001-09-27 09:28:49.0
has crystal cell dimension a = 353.1, c = 569.3 pm for α-He at 1.15 K, 6.69 MPa2001-09-27 09:28:49.0
has crystal cell dimension a = 424.0 pm for β-He at 16K, 127 MPa2001-09-27 09:28:49.0
has crystal cell dimension a = 411 pm for γ-He at 1.73 K, 2.94 MPa2001-09-27 09:28:49.0
has crystal type h.c.p. for α-He at 1.15 K, 6.69 MPa2001-09-27 09:28:49.0
has crystal type f.c.c. for β-He at 16K, 127 MPa2001-09-27 09:28:49.0
has crystal type b.c.c. for γ-He at 1.73 K, 2.94 MPa2001-09-27 09:28:49.0
has atomic emission line 388.865 nm for He I2001-09-27 09:28:49.0
has atomic emission line 587.562 nm for He I2001-09-27 09:28:49.0
has atomic emission line 1083.025 nm for He I2001-09-27 09:28:49.0
has atomic emission line 1083.034 nm for He I (strong)2001-09-27 09:28:49.0
has atomic emission line 1868.534 nm for He I2001-09-27 09:28:49.0
has atomic emission line 2058.130 nm for He I2001-09-27 09:28:49.0
has term symbol 1S0 in ground state2001-09-27 09:28:49.0
has electron configuration 1s2 = [He] in ground state2001-09-27 09:28:49.0
has mass of element in person very small for a 70 kg average person2001-09-27 09:28:49.0
has daily dietary intake very low2001-09-27 09:28:49.0
has level in humans traces2001-09-27 09:28:49.0
has hazard harmless but could asphyxiate if it excludes oxygen from the lungs2001-09-27 09:28:49.0
has biological role none2001-09-27 09:28:49.0
has thermal conductivity 0.152 W m-1 K-1 at 300 K2001-09-27 09:28:49.0
has molar volume 32.07 cm3 at 4 K2001-09-27 09:28:49.0
has heat capacity 20.786 J K-1 mol-1 for gas at constant pressure 0.1 MPa at 298.15 K2001-09-27 09:28:49.0
has heat of vaporization 0.082 kJ mol-12001-09-27 09:28:49.0
has heat of fusion 0.021 kJ mol-12001-09-27 09:28:49.0
has boiling point 4.216 K2001-09-27 09:28:49.0
has melting point 0.95 K under pressure2001-09-27 09:28:49.0
has relative atomic mass 4.005602 in units of 12C = 12.0002001-09-27 09:28:49.0
has atomic radii 128 pm2001-09-27 09:28:49.0
has number of protons 22001-09-27 09:28:49.0
has registry number 7440-59-7 for Chemical Abstracts System databasehas URL: http://info.cas.org, 2001-09-27 09:28:49.0
has density 124.8 kg m-3 for liquid at 4.216 K boiling point2001-09-27 09:28:49.0
has density 0.1785 kg m-3 for gas at 273 K2001-09-27 09:28:49.0
has synthesis mechanism2001-09-27 09:28:50.0
has ocean oxidation state 02001-09-27 09:28:27.0
has atomic number 22001-09-27 09:28:49.0
reacts with nothing2001-09-27 09:28:49.0
has discovery date 18682001-09-27 09:28:50.0
has discoverer Norman Lockyer and Edward Frankland2001-09-27 09:28:50.0
has uses deep-sea diving, weather baloons, low temperature research2001-09-27 09:28:49.0
has image 2001-09-27 09:28:32.0
has critical pressure 229 kPa2001-09-27 09:28:49.0
has critical temperature 5.25 K2001-09-27 09:28:49.0
unclassified oceanic elementhas ocean residence time unknown2001-09-27 09:28:26.0
has ocean concentration unknown2001-09-27 09:28:26.0
inert gashas group 182001-09-27 09:28:25.0
has synonym group VIII element2001-09-27 09:28:25.0
has synonym noble gas2001-09-27 09:28:25.0
elementis a part of Universe2001-09-27 09:32:17.0
oceanic elementhas occurrence ocean2001-09-27 09:28:26.0
atmophile elementhas occurrence atmosphere of a planet or asteroid2001-09-27 09:28:26.0
gaseous elementhas state gas at standard temperature and pressure2001-09-27 09:28:25.0
particleobeys uncertainty principle2001-09-27 09:28:02.0
has frequency inversely proportional to the wavelength2001-09-27 09:28:02.0
has wavelength inversely proportional to its momentum2001-09-27 09:28:02.0
has charge2001-09-27 09:28:01.0
has mass2001-09-27 09:28:02.0
physical objecthas location or center of gravity2001-09-27 09:27:27.0
has angular momentum2001-09-27 09:27:27.0
has velocity2001-09-27 09:27:27.0
has momentum2001-09-27 09:27:27.0
has temperature2001-09-27 09:27:27.0
has volume2001-09-27 09:27:27.0
has extent2001-09-27 09:27:27.0
has material2001-09-27 09:27:27.0

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