Árgọ̀nù

(Àtúnjúwe láti Argon)

Árgọ̀nù je elimenti kemika kan to ni ami-idamo Ar ati nomba atomu 18. O wa ninu egbe 18 (awon efuufu abiire) lori tabili idasiko awon elimenti. Argonu ni efuufu keta to wopo julo ninu afefeayika 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, eyun dioksidi karbonu (390 ppm), ati to po repete ni ona to to 500 bi ti efuufu abiire keji to wopo, eyun neonu (18 ppm). Bi gbogbo argonu yi lo je argonu-40 radiogeniki to wa lati ituka potassium-40 ninu igbele Aye. Ni agbalaaye, argonu-36 ni isotopu argonu to wopo julo, nitoripe o je isotopu argonu to je dida pelu stellar ikojonukleu irawo ninu awon supanofa (awon irawo akomonamona).

Árgọ̀nù, 18Ar
Àdàkọ:Infobox element/symbol-to-top-image/alt
Árgọ̀nù
Pípè /ˈɑːrɡɒn/ (AR-gon)
Ìhànsójúcolorless gas exhibiting a lilac/violet glow when placed in a high voltage electric field
Ìwúwo átọ̀mù Ar, std(Ar)[39.79239.963] conventional: 39.95[1]
Árgọ̀nù ní orí tábìlì 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 ẹ́límẹ́ntì  [[Àdàkọ:Infobox element/symbol-to-category]]
Ìtò ẹ̀lẹ́ktrọ́nùÀdàkọ:Infobox element/symbol-to-electron-configuration
Iye ẹ̀lẹ́ktrọ́nù lórí ìpele kọ̀ọ̀kan2, 8, 8
Àwọn ohun ìní ara
Ìfarahàn at STPgas
Ìgbà ìyọ́83.80 K ​(−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 (at b.p.)1.40 g/cm3
Triple point83.8058 K, ​69 kPa
Critical point150.87 K, 4.898 MPa
Heat of fusion1.18 kJ/mol
Heat of 6.43 kJ/mol
Molar heat capacity5R/2 = 20.786 J/(mol·K)
 pressure
Atomic properties
Oxidation statesÀdàkọ:Infobox element/symbol-to-oxidation-state
ElectronegativityPauling scale: no data
energies
Covalent radius106±10 pm
Van der Waals radius188 pm
Àdàkọ:Infobox element/spectral lines
Other properties
Natural occurrenceÀdàkọ:Infobox element/symbol-to-occurrence
Crystal structureÀdàkọ:Infobox element/crystal structure
Speed of sound(gas, 27 °C) 323 m/s
Thermal conductivity17.72x10-3  W/(m·K)
Magnetic orderingdiamagnetic[2]
CAS Number7440–37–1
History
DiscoveryLord Rayleigh and William Ramsay (1894)
First isolationLord Rayleigh and William Ramsay (1894)
Main isotopes of árgọ̀nù
Iso­tope Abun­dance Half-life (t1/2) Decay mode Pro­duct
36Ar 0.337% 36Ar is stable with 18 neutrons
37Ar syn 35 d ε 0.813 37Cl
38Ar 0.063% 38Ar is stable with 20 neutrons
39Ar trace 269 y β 0.565 39K
40Ar 99.600% 40Ar is stable with 22 neutrons
41Ar syn 109.34 min β 2.49 41K
42Ar syn 32.9 y β 0.600 42K
Àdàkọ:Category-inline
| references


ItokasiÀtúnṣe

  1. "IUPAC Periodic Table of the Elements and Isotopes". King's Center for Visualization in Science. IUPAC, King's Center for Visualization in Science. Retrieved 8 October 2019. 
  2. Magnetic susceptibility of the elements and inorganic compounds, in Handbook of Chemistry and Physics 81st edition, CRC press.