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Argon

Argon is a chemical element; it has symbol Ar and atomic number 18. It is in group 18 of the periodic table and is a noble gas. Argon is the third most abundant gas in Earth's atmosphere, at 0.934% (9340 ppmv). It is more than twice as abundant as water vapor (which averages about 4000 ppmv, but varies greatly), 23 times as abundant as carbon dioxide…

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36Ar
0.334%
37Ar
trace
38Ar
0.0630%
39Ar
trace
40Ar
99.6%
41Ar
trace

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Compounds

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Argon

Nodes188
Edges187
Triples175
Avg. degree1.99
Density0.010638
Components1

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Argon

Top relations

related to Scientific research · 23
Argon → Ar, ArDM, As, At Linköping University, Compared, Dark-matter, DarkSide, DEAP, Earth, Earth's, ICARUS, Liquid, MicroBooNE, Most, Neutrino, On, Sweden, The, This, Two-phase
related to Compounds · 20
Argon → Ar, ArCF2, Argon's, Argon-36, Before, CO, Crab Nebula, GPa, H2, HArF, Helsinki, However, In August, It, MgZn2 Laves, Raman, Solid, The, This, University
related to history · 16
Argon → An, Ancient Greek, Cavendish's, CC, DD, Grove, Henry Cavendish, Henry Cavendish's, Lord Rayleigh, Ruhmkorff, Sir William Ramsay, The, They, This, U-shaped, University College London
related to External links · 9
Argon → Argon Archived, Nottingham, September, The Periodic Table, University, USGS Periodic Table, Videos, Wayback MachineDiving, Why Argon
related to Isotopes · 9
Argon → Ar, Ca, Earth, In, In Earth's, It, Naturally, The, These
is a · 7
Argon → chemical element, chemically inert gas.Argon is the cheapest alternative when nitrogen is not sufficiently inert.Argon has low thermal conductivity.Argon has electronic properties, decay of 40 K in rocks, most abundant noble gas in Earth's crust, most plentiful by far, noble gas, third most abundant gas in Earth's atmosphere
related to Characteristics · 6
Argon → Although, ArF, ArH, HArF, Ions, Theoretical
related to Miscellaneous uses · 6
Argon → AIM-9 Sidewinder, Compressed, Rocket, The, Variable Specific Impulse Magnetoplasma, VASIMR
related to Preservative · 5
Argon → Aerial, E938, European, High-purity, In
Ionization energies · 4
Argon → (more), 1st: 1520.6 kJ/mol, 2nd: 2665.8 kJ/mol, 3rd: 3931 kJ/mol

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Important terminology

gas used ar nitrogen also oxygen air atmosphere inert liquid noble earth's produced chemical stable compounds 40 form atomic 18

Entity relationships Subject–Predicate–Object triples

SubjectPredicateObjectConfidenceSrc
Argon36Ar0.334%1.00infobox
Argon37Artrace1.00infobox
Argon38Ar0.0630%1.00infobox
Argon39Artrace1.00infobox
Argon40Ar99.6%1.00infobox
Argon41Artrace1.00infobox
Argon42Arsynth1.00infobox
ArgonAppearancecolorless gas exhibiting a lilac/violet glow when placed in an electric field1.00infobox
ArgonAtomic number (Z)181.00infobox
ArgonAtomic radiusempirical: 31 pm1.00infobox
ArgonBlockp-block1.00infobox
ArgonBoiling point87.302 K ​(−185.848 °C, ​−302.526 °F)1.00infobox
ArgonCAS Number7440-37-11.00infobox
ArgonCovalent radius106±10 pm1.00infobox
ArgonCritical point150.687 K, 4.863 MPa1.00infobox
ArgonCrystal structure​face-centered cubic (fcc) (cF4)1.00infobox
ArgonDensity (at STP)1.784 g/L1.00infobox
ArgonDiscovery and first isolationLord Rayleigh and William Ramsay (1894)1.00infobox
ArgonElectron configuration[Ne] 3s2 3p61.00infobox
ArgonElectronegativityPauling scale: no data1.00infobox
ArgonElectrons per shell2, 8, 81.00infobox
ArgonGroupgroup 18 (noble gases)1.00infobox
ArgonHeat of fusion1.18 kJ/mol1.00infobox
ArgonHeat of vaporization6.53 kJ/mol1.00infobox
ArgonIonization energies1st: 1520.6 kJ/mol1.00infobox
ArgonIonization energies2nd: 2665.8 kJ/mol1.00infobox
ArgonIonization energies3rd: 3931 kJ/mol1.00infobox
ArgonIonization energies(more)1.00infobox
ArgonLattice constanta = 546.91 pm (at triple point)1.00infobox
ArgonMagnetic orderingdiamagnetic1.00infobox

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