کينډۍ:Infobox chlorine

Chlorine,  ₁₇Cl

A glass container filled with chlorine gas
Spectral lines of chlorine
عمومي خواص
Pronunciation	/ˈklɔəriːn/ or /ˈklɔərɪn/ KLOHR-een or KLOHR-in
Appearance	pale yellow-green gas
Chlorine په دوراني جدول کې
F ↑ Cl ↓ Br sulfur ← chlorine → argon ‍
اټومي شمیره (Z)	17
گروپ, پیریود	group 17 (halogens), period 3
بلاک	p-block
Element category	diatomic nonmetal
معياري اټومي وزن (Ar)	[35.446, 35.457] conventional: 35.45
Electron configuration	[Ne] 3s2 3p5
Electrons per shell	2, 8, 7
فزیکي خواص
حالت (at STP)	گاز
دويلې کيدو ټکى	171.6 K ​(−101.5 °C, ​−150.7 °F)
يشنا ټکی	239.11 K ​(−34.04 °C, ​−29.27 °F)
کثافت (at STP)	3.2 g/L
when liquid, at b.p.	1.5625 g/cm3
Critical point	416.9 K, 7.991 MPa
Heat of fusion	(Cl2) 6.406 kJ/mol
Heat of vaporisation	(Cl2) 20.41 kJ/mol
Molar heat capacity	(Cl2) 33.949 J/(mol·K)
Vapour pressure P (Pa) 1 10 100 1 k 10 k 100 k at T (K) 128 139 153 170 197 239
اټومي خواص
Oxidation states	7, 6, 5, 4, 3, 2, 1, −1 ​(a strongly acidic oxide)
Electronegativity	Pauling scale: 3.16
Ionisation energies	1st: 1251.2 kJ/mol 2nd: 2298 kJ/mol 3rd: 3822 kJ/mol (more)
Covalent radius	102±4 pm
Van der Waals radius	175 pm
Miscellanea
Crystal structure	​orthorhombic Orthorhombic crystal structure for chlorine
Speed of sound	206 m/s (gas, at 0 °C)
د تودوخې تېرېدنه	8.9کينډۍ:E W/(m·K)
Electrical resistivity	>10 Ω·m (at 20 °C)
Magnetic ordering	diamagnetic
Magnetic susceptibility (χmol)	−40.5·10−6 cm3/mol
CAS Number	7782-50-5
History
Discovery and first isolation	Carl Wilhelm Scheele (1774)
Recognized as an element by	Humphry Davy (1808)
Main isotopes of chlorine
آيسو­ټوپ Abun­dance نیم ژوند (t1/2) Decay mode Pro­duct 35Cl 76% stable 37Cl 24% stable

Element navigation

PTchlorinePT

S ←

iso 17Cl ibox    wd:Q688

→ Ar

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