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Árgọ̀nù

Lát'ọwọ́ Wikipedia, ìwé ìmọ̀ ọ̀fẹ́
(Àtúnjúwe látiArgon)
Árgọ̀nù,18Ar
Vial containing a violet glowing gas
Árgọ̀nù
Pípè/ˈɑːrɡɒn/(AR-gon)
Ìhànsójúcolorless gas exhibiting a lilac/violet glow when placed in a high voltage electric field
Ìwúwo átọ̀mùAr, std(Ar)[39.792,39.963] conventional:39.95[1]
Árgọ̀nù ní orítábìlì àyè
Hydrogen Helium
Lithium Beryllium Boron Carbon Nitrogen Oxygen Fluorine Neon
Sodium Magnesium Aluminium Silicon Phosphorus Sulfur Chlorine Argon
Potassium Calcium Scandium Titanium Vanadium Chromium Manganese Iron Cobalt Nickel Copper Zinc Gallium Germanium Arsenic Selenium Bromine Krypton
Rubidium Strontium Yttrium Zirconium Niobium Molybdenum Technetium Ruthenium Rhodium Palladium Silver Cadmium Indium Tin Antimony Tellurium Iodine Xenon
Caesium Barium Lanthanum Cerium Praseodymium Neodymium Promethium Samarium Europium Gadolinium Terbium Dysprosium Holmium Erbium Thulium Ytterbium Lutetium Hafnium Tantalum Tungsten Rhenium Osmium Iridium Platinum Gold Mercury (element) Thallium Lead Bismuth Polonium Astatine Radon
Francium Radium Actinium Thorium Protactinium Uranium Neptunium Plutonium Americium Curium Berkelium Californium Einsteinium Fermium Mendelevium Nobelium Lawrencium Rutherfordium Dubnium Seaborgium Bohrium Hassium Meitnerium Darmstadtium Roentgenium Copernicium Nihonium Flerovium Moscovium Livermorium Tennessine Oganesson
Ne

Ar

Kr
klorínìárgọ̀nùpotassium
Nọ́mbà átọ̀mù(Z)18
Ẹgbẹ́group 18 (noble gases)
Àyèàyè 3
Àdìpọ̀Àdìpọ̀-p
Ẹ̀ka ẹ́límẹ́ntìẸ̀fúùfù abíire
Ìtò ẹ̀lẹ́ktrọ́nù[Ne] 3s23p6
Iye ẹ̀lẹ́ktrọ́nù lórí ìpele kọ̀ọ̀kan2, 8, 8
Àwọn ohun ìní ara
ÌfarahànatSTPgas
Ìgbà ìyọ́83.80K​(−189.35 °C, ​−308.83 °F)
Ígbà ìhó87.30 K ​(−185.85 °C, ​−302.53 °F)
Kíki(at STP)1.784 g/L
when liquid (atb.p.)1.40 g/cm3
Triple point83.8058 K, ​69 kPa
Critical point150.87 K, 4.898 MPa
Heat of fusion1.18kJ/mol
Heat of6.43 kJ/mol
Molar heat capacity5R/2 = 20.786 J/(mol·K)
pressure
P(Pa) 1 10 100 1 k 10 k 100 k
atT(K) 47 53 61 71 87
Atomic properties
Oxidation states0
ElectronegativityPauling scale: no data
energies
Covalent radius106±10pm
Van der Waals radius188pm
Color lines in a spectral range
Color lines in a spectral range
Spectral linesof árgọ̀nù
Other properties
Natural occurrenceprimordial
Crystal structure​(fcc)
Face-centered cubic crystal structure for árgọ̀nù
Speed of sound(gas, 27 °C) 323m/s
Thermal conductivity17.72x10-3W/(m·K)
Magnetic orderingdiamagnetic[2]
CAS Number7440–37–1
History
DiscoveryLord RayleighandWilliam Ramsay(1894)
First isolationLord Rayleigh and William Ramsay(1894)
Mainisotopes of árgọ̀nù
Iso­tope Abun­dance Half-life(t1/2) Decay mode Pro­duct
36Ar 0.337% 36Ar isstablewith 18neutrons
37Ar syn 35d ε 0.813 37Cl
38Ar 0.063% 38Ar isstablewith 20neutrons
39Ar trace 269y β 0.565 39K
40Ar 99.600% 40Ar isstablewith 22neutrons
41Ar syn 109.34min β 2.49 41K
42Ar syn 32.9y β 0.600 42K
Àdàkọ:Category-inline
|references

Árgọ̀nùjeelimenti kemikakan to ni ami-idamoAratinomba atomu18. O wa ninuegbe 18 (awon efuufu abiire)loritabili idasiko awon elimenti.Argonu ni efuufu keta to wopo julo ninuafefeayika Aye,ni 0.93% (9,300 ppm), eyi so di eyi to repete ni ona bi 23.8 bi ti efuufu inu afefeayika tto wopo julo to tele, eyundioksidi karbonu(390 ppm), ati to po repete ni ona to to 500 bi ti efuufu abiire keji to wopo, eyunneonu(18 ppm). Bi gbogbo argonu yi lo jeargonu-40radiogenikito wa lati itukapotassium-40ninu igbele Aye. Ni agbalaaye,argonu-36ni isotopu argonu to wopo julo, nitoripe o je isotopu argonu to je dida pelu stellarikojonukleuirawo ninu awonsupanofa(awon irawo akomonamona).


  1. "IUPAC Periodic Table of the Elements and Isotopes".King's Center for Visualization in Science.IUPAC, King's Center for Visualization in Science.Retrieved8 October2019.
  2. Magnetic susceptibility of the elements and inorganic compounds,in Handbook of Chemistry and Physics 81st edition, CRC press.