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physical object > natural object > particle > element > column grouped element > group VI element > oxygen

oxygen (O, 3P2 in ground state)
subject			fact

oxygen	has symbol O
	has lethal intake 4800 p.p.m. for 4 hours inhaled ozone (O3)
	has reserves 1.2 × 1015 tonnes in atmosphere
	has mineral oxides, silicates, carbonates, phosphates, sulfates also occurs as gas in atmosphere and as water
	has neutron scattering length 0.5803 × 10-12 cm
	has electron affinity 141 kJ mol-1 from O to O-
	has toxic intake non-toxic as O2, but toxic as ozone (O3)
	has mass magnetic susceptibility +1.355 × 10-6 kg-1 m3 for gas
	has van der Waals radii 140 pm
	has covalent radii 66 pm for single bond
	has thermal neutron capture cross section 0.00019 barns
	has longest lived isotope oxygen 16
	has isotope mass range 13 to 20
	has number of isotopes 8 including nuclear isomers
	has pronunciation oksi-jen
	has name origin oxy genes = acid forming from Greek
	has discovery location Leeds, England and Uppsala, Sweeden
	has abundance 6.92 × 108 in Sun relative to H = 1 × 1012
	has abundance 474000 p.p.m. in Earth's crust (most abundant element on surface)
	has abundance constituent element of water
	has specimen small pressurized canisters. Safe, but be aware of possible dangers.
	has world production 1 × 108
	has chief source liquid air
	has mass absorption coefficient 11.5 cm2 g-1 for CuKα X-ray diffraction
	has mass absorption coefficient 1.31 cm2 g-1 for MoKα X-ray diffraction
	has space group
	has crystal cell dimension a = pm
	has crystal type
	has atomic emission line 777.194 nm for O I
	has atomic emission line 777.417 nm for O I
	has atomic emission line 844.625 nm for O I
	has atomic emission line 844.636 nm for O I
	has atomic emission line 844.676 nm for O I
	has term symbol 3P2 in ground state
	has electron configuration [He]2s22p4 in ground state
	has mass of element in person 43 kg for a 70 kg average person, mainly as water
	has daily dietary intake mainly as water
	has level in humans constitutent of water
	has level in humans 285000 p.p.m. in bone
	has level in humans 160000 p.p.m. in liver
	has level in humans 160000 p.p.m. in muscle
	has hazard O2 within a few percent of its natural concentration in air is harmless, but too little and it cannot sustain life, too much and it can cause pulmonary changes and teratogenic effects and is a fire hazard.
	has biological role constituent element of DNA and of most other biologically important compounds
	has thermal conductivity 0.2674 W m-1 K-1 at 300 K
	has molar volume 8.00 cm3 at 54 K
	has heat capacity 29.355 J K-1 mol-1 for molecular gas (O2 at constant pressure 0.1 MPa at 298.15 K
	has heat capacity 21.912 J K-1 mol-1 for atomic gas at constant pressure 0.1 MPa at 298.15 K
	has heat of sublimation kJ mol-1
	has heat of vaporization 6.82 kJ mol-1
	has heat of fusion 0.444 kJ mol-1
	has boiling point 90.188 K
	has melting point 54.8 K
	has electronegativity 3.44 Pauling
	has relative atomic mass 15.9994 in units of 12C = 12.000
	has ionic radii 22 pm for O+
	has ionic radii 132 pm for O2-
	has atomic radii pm
	has number of protons 8
	has registry number 7782-44-7 for Chemical Abstracts System database
	has density 2000 kg m-3 for solid at 54.8 K melting point
	has density 1140 kg m-3 for liquid at 90.188 K boiling point
	has density 1.429 kg m-3 for gas at 273 K
	has atomic number 8
	reacts with all other elements except He, Ne, Ar and Kr
has discovery date 1774
has discoverer J. Priestley, C.W. Sheele
has uses steel-making, metal-cutting, the chemical industry and in medical treatment
has image
has definition colourless, odourless gas (O2) which is very reactive
is a kind of nonmetallic element
is a kind of group VI element
is a kind of gaseous element
is a kind of atmophile element
is a kind of unclassified oceanic element
has critical pressure 5043 kPa
has critical temperature 154.58 K
unclassified oceanic element	has ocean residence time unknown
	has ocean concentration unknown
atmophile element	has occurrence atmosphere of a planet or asteroid
gaseous element	has state gas at standard temperature and pressure
group VI element	has group 16
	has synonym chalcogen
element	is a part of Universe
oceanic element	has ocean oxidation state
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 oxygen :

• oxygen 14 (9 facts) (¹⁴O)
• oxygen 15 (10 facts) (¹⁵O)
• oxygen 16 (8 facts) (¹⁶O)
• oxygen 17 (14 facts) (¹⁷O)
• oxygen 18 (8 facts) (¹⁸O)

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