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physical object > natural object > particle > element > column grouped element > inert gas > argon > argon 40

argon 40 (40Ar)
subject			fact

argon 40	has symbol 40Ar
	has natural abundance 99.600 %
	has nuclear magnetic moment μ = 0
	has nuclear spin I = 0+
	has number of nucleons 40
	has number of neutrons 22
	has atomic mass 39.9623837
	is an instance of argon
argon	has stable isotope argon 36
	has stable isotope argon 38
	has stable isotope argon 40
	has lethal intake non-toxic
	has reserves 6.6 × 1013 tonnes in atmosphere
	has mineral none
	has neutron scattering length 0.1909 × 10-12 cm
	has electron affinity -35 kJ mol-1 from Ar to Ar-
	has toxic intake non-toxic
	has mass magnetic susceptibility -6.16 × 10-9 kg-1 m3 for gas
	has van der Waals radii 191 pm
	has thermal neutron capture cross section 0.675 barns
	has isotope mass range 32 to 46
	has number of isotopes 15
	has pronunciation ar-gon
	has name origin argos = inactive from Greek
	has discovery location London and Bristol, England
	has abundance 1 × 106 in Sun relative to H = 1 × 1012
	has abundance 1.2 p.p.m. in Earth's crust
	has abundance 9300 p.p.m. in atmopshere
	has specimen available in small pressurized canisters. Safe.
	has world production 700000 tonnes per year
	has chief source lquid air
	has mass absorption coefficient 123 cm2 g-1 for CuKα X-ray diffraction
	has mass absorption coefficient 13.5 cm2 g-1 for MoKα X-ray diffraction
	has space group Fm3m
	has crystal cell dimension a = 531.088 pm
	has crystal type f.c.c
	has atomic emission line 695.5431 nm for Ar I
	has atomic emission line 706.7218 nm for Ar I
	has atomic emission line 750.3869 nm for Ar I
	has atomic emission line 801.4786 nm for Ar I
	has atomic emission line 811.5311 nm for Ar I (strong)
	has atomic emission line 912.2967 nm for Ar I
	has atomic emission line 965.7786 nm for Ar I
	has term symbol 1S0 in ground state
	has electron configuration [Ne]3s23p6 in ground state
	has mass of element in person very small for a 70 kg average person
	has daily dietary intake very low
	has level in humans trace amounts in blood
	has hazard can asphyxiate if it excludes oxygen from the lungs
	has biological role none
	has thermal conductivity 0.0177 W m-1 K-1 at 300 K for gas
	has molar volume 24.12 cm3 at 40 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 6.53 kJ mol-1
	has heat of fusion 2.21 kJ mol-1
	has boiling point 87.29 K
	has melting point 83.78 K
	has relative atomic mass 39.948 in units of 12C = 12.000
	has atomic radii 174 pm
	has number of protons 18
	has registry number 7440-37-1 for Chemical Abstracts System database
	has density 1656 kg m-3 for solid at 40 K
	has density 1380 kg m-3 for liquid at 87.29 K boiling point
	has density 1.784 kg m-3 for gas at 273 K
	has synthesis mechanism extracted from the atmosphere by liquefaction
	has ocean oxidation state 0
	has ocean residence time 28000 years
	has atomic number 18
	reacts with nothing
	has discovery date 1894
	has discoverer Lord Rayleigh and Sir William Ramsay
	has uses inert atmosphere in lamps and high temperature metallurgy
has image
has critical pressure 4862 kPa
has critical temperature 150.87 K
unclassified oceanic element	has ocean concentration unknown
inert gas	has group 18
	has synonym group VIII element
	has synonym noble gas
oceanic element	has occurrence ocean
atmophile element	has occurrence atmosphere of a planet or asteroid
gaseous element	has state gas at standard temperature and pressure
element	is a part of Universe
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

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