کينډۍ:Infobox oxygen

Oxygen,  ₈O

A transparent beaker containing a light blue fluid with gas bubbles Liquid oxygen boiling
Spectral lines of oxygen
عمومي خواص
Pronunciation	/ˈɒksɪdʒən/ OK-SIJ-ən
Appearance	gas: colorless liquid: pale blue
Oxygen په دوراني جدول کې
– ↑ O ↓ S nitrogen ← oxygen → fluorine ‍
اټومي شمیره (Z)	8
گروپ, پیریود	group 16 (chalcogens), period 2
بلاک	p-block
Element category	diatomic nonmetal
معياري اټومي وزن (Ar)	[[[:کينډۍ:Val]], کينډۍ:Val] conventional: 15.999
Electron configuration	[He] 2s2 2p4
Electrons per shell	2, 6
فزیکي خواص
حالت (at STP)	گاز
دويلې کيدو ټکى	54.36 K ​(−218.79 °C, ​−361.82 °F)
يشنا ټکی	90.188 K ​(−182.962 °C, ​−297.332 °F)
کثافت (at STP)	1.429 g/L
when liquid, at b.p.	1.141 g/cm3
Triple point	54.361 K, ​0.1463 kPa
Critical point	154.581 K, 5.043 MPa
Heat of fusion	(O2) 0.444 kJ/mol
Heat of vaporization	(O2) 6.82 kJ/mol
Molar heat capacity	(O2) 29.378 J/(mol·K)
Vapor pressure P (Pa) 1 10 100 1 k 10 k 100 k at T (K)       61 73 90
اټومي خواص
Oxidation states	2, 1, −1, −2
Electronegativity	Pauling scale: 3.44
Ionization energies	1st: 1313.9 kJ/mol 2nd: 3388.3 kJ/mol 3rd: 5300.5 kJ/mol (more)
Covalent radius	66±2 pm
Van der Waals radius	152 pm
Miscellanea
Crystal structure	​cubic Cubic crystal structure for oxygen
Speed of sound	330 m/s (gas, at 27 °C)
د تودوخې تېرېدنه	26.58×10−3  W/(m·K)
Magnetic ordering	paramagnetic
Magnetic susceptibility (χmol)	+3449.0·10−6 cm3/mol (293 K)
CAS Number	7782-44-7
History
Discovery	Carl Wilhelm Scheele (1771)
Named by	Antoine Lavoisier (1777)
Main isotopes of oxygen
آيسو­ټوپ Abun­dance نیم ژوند (t1/2) Decay mode Pro­duct 16O 99.76% stable 17O 0.04% stable 18O 0.20% stable

Element navigation

PToxygenPT

N ←

iso 8O ibox    wd:Q629

→ F

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