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arsenic 72 (72As)
subject			fact

arsenic 72	has symbol 72As
	has nuclear magnetic moment μ = -2.1566
	has nuclear spin I = 2-
	has decay mode β+ (4.355 Mev) 77%
	has decay mode γ
	has half life 26.0 hours
	has number of nucleons 72
	has number of neutrons 39
	has atomic mass 71.926755
	is an instance of arsenic
arsenic	has lethal intake 50 to 300 mg
	has main mining area not much mined as such because more than required is produced as a by-product of refining certain sulfide ores
	has mineral arsenopyrite, conichalcite, enargite, lollingite, olivenite, orpiment and realgar
	has neutron scattering length 0.658 × 10-12 cm
	has electron affinity 78 kJ mol-1 from As to As-
	has toxic intake 5 to 50 mg
	has mass magnetic susceptibility -9.17 × 10-10 kg-1 m3 for α form
	has mass magnetic susceptibility -3.97 × 10-9 kg-1 m3 for β form
	has electrical resistivity 26 × 10-8 Ω m at 273 K
	has van der Waals radii 200 pm
	has covalent radii 121 pm
	has thermal neutron capture cross section 4.30 barns
	has isotope mass range 67 to 87
	has number of isotopes 22
	has pronunciation ahrs-nik
	has name origin arsenikon = yellow orpiment from Greek
	has discovery location Germany
	has abundance see list in Sun relative to H = 1 × 1012
	has abundance 1.5 p.p.m. in Earth's crust
	has abundance 1.45 × 10-3 p.p.m. in Atlantic surface seawater
	has abundance 1.53 × 10-3 p.p.m. in deep Atlantic seawater
	has abundance 1.45 × 10-3 p.p.m. in Pacific surface seawater
	has abundance 1.75 × 10-3 p.p.m. in deep Pacific seawater
	has specimen available as powder. Danger !
	has world production 47000 tonnes per year for As2O3
	has chief source arsenopyrite, realgar and orpiment
	has mass absorption coefficient 83.4 cm2 g-1 for CuKα X-ray diffraction
	has mass absorption coefficient 69.7 cm2 g-1 for MoKα X-ray diffraction
	has space group R3m for α form
	has crystal cell dimension a = 413.18 pm for α form
	has crystal cell dimension alpha angle = 54 deg 10' for α form
	has crystal cell dimension a = 376.0 pm for β form
	has crystal cell dimension c = 10.548 pm for β form
	has crystal type rhombohedral for α form
	has crystal type hexagonal for β form
	has atomic emission line 193.759 nm for As I (Strong, used in atom absorption spectrometry)
	has atomic emission line 419.008 nm for As II
	has atomic emission line 445.847 nm for As II
	has atomic emission line 446.635 nm for As II
	has atomic emission line 449.423 nm for As II
	has atomic emission line 450.766 nm for As II
	has atomic emission line 454.348 nm for As II
	has term symbol 4S3/2 in ground state
	has electron configuration [Ar]3d104s24p3 in ground state
	has mass of element in person 0.5 to 15 mg for a 70 kg average person depending on diet
	has daily dietary intake 0.04 to 1.4 mg
	has level in humans 0.0017 to 0.09 mg dm-3 in blood
	has level in humans 0.08 to 1.6 p.p.m. in bone
	has level in humans 0.023 to 1.61 p.p.m. in liver
	has level in humans 0.009 to 0.65 p.p.m. in muscle
	has hazard salts and arsine gases are very poisonous. Stimulates metabolism in small doses, but it is carcinogenic and possibly teratogenic
	has biological role essential to some species including humans
	has linear expansion coefficient 4.6 × 10-6 K-1
	has thermal conductivity 50.0 W m-1 K-1 at 300 K for α form
	has molar volume 12.95 cm3 for α form
	has molar volume 15.9 cm3 for β form
	has heat capacity 24.64 J K-1 mol-1 for solid at constant pressure of 0.1 MPa at 298.15 K
	has heat capacity 20.786 J K-1 mol-1 for gas at constant pressure of 0.1 MPa at 298.15 K
	has heat of vaporization 31.9 kJ mol-1
	has heat of fusion 27.7 kJ mol-1
	has boiling point 889 K sublimes
	has melting point 1090 K for α form under pressure
	has electronegativity 2.18 Pauling
	has relative atomic mass 74.92159 in units of 12C = 12.000
has ionic radii 46 pm for As5+
has ionic radii 69 pm for As3+
has atomic radii 125 pm
has number of protons 33
has registry number 7440-38-2 for Chemical Abstracts System database
has density 5780 kg m-3 for solid at 293 K (α form)
has density 4700 kg m-3 for solid at 293 K (β form)
has ocean oxidation state V
has ocean residence time 90000 years
has atomic number 33
reacts with hot acids and molten NaOH, tarnishes burns in oxygen
has hardness brittle for α form
has discovery date 1250
has discoverer Albertus Magnus
has uses alloys, semiconductors, pesticides, wood preservatives and glass
has image
has appearance metallic for α form
recycled oceanic element	has ocean concentration increasing with depth
group V element	has group 15
	has synonym pnictogen
oceanic element	has occurrence ocean
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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