Template:Infobox chlorine

	child table, as reused in {IB-Cl} v; e; h;
Main isotopes of chlorine
ε	36S

Chlorine, ₁₇Cl
Chlorine
Pronunciation	/ˈklɔːriːn, -aɪn/ (KLOR-een, -⁠eyen)
Appearance	pale yellow-green gas
Standard atomic weight Ar°(Cl)
	[35.446, 35.457]; 35.45±0.01 (abridged);
Chlorine in the periodic table
	sulfur ← chlorine → argon
Atomic number (Z)	17
Group	group 17 (halogens)
Period	period 3
Block	p-block
Electron configuration	[Ne] 3s2 3p5
Electrons per shell	2, 8, 7
Physical properties
Phase at STP	gas
Melting point	(Cl2) 171.6 K (−101.5 °C, −150.7 °F)
Boiling point	(Cl2) 239.11 K (−34.04 °C, −29.27 °F)
Density (at STP)	3.2 g/L
when liquid (at b.p.)	1.5625 g/cm3
Triple point	172.22 K, 1.392 kPa
Critical point	416.9 K, 7.991 MPa
Heat of fusion	(Cl2) 6.406 kJ/mol
Heat of vaporization	(Cl2) 20.41 kJ/mol
Molar heat capacity	(Cl2); 33.949 J/(mol·K)
Atomic properties
Oxidation states	−1, 0, +1, +2, +3, +4, +5, +6, +7 (a strongly acidic oxide)
Electronegativity	Pauling scale: 3.16
Ionization 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
	Spectral lines of chlorine
Other properties
Natural occurrence	primordial
Crystal structure	orthorhombic (oS8)
Lattice constants	a = 630.80 pm; b = 455.83 pm; c = 815.49 pm (at triple point)
Thermal conductivity	8.9×10−3 W/(m⋅K)
Electrical resistivity	>10 Ω⋅m (at 20 °C)
Magnetic ordering	diamagnetic
Molar magnetic susceptibility	−40.5×10−6 cm3/mol
Speed of sound	206 m/s (gas, at 0 °C)
CAS Number	Cl2: 7782-50-5
History
Discovery and first isolation	Carl Wilhelm Scheele (1774)
Recognized as an element by	Humphry Davy (1808)
Isotopes of chlorine v; e;
ε	36S
	Category: Chlorine; view; talk; edit; \| references

Cl · Chlorine
S ← ibox S	^iso ₁₇Cl [e] IB-Cl [e] IBisos [e]	→ Ar ibox Ar
cat:Cl (17) cat:Cl-isotopes (25) Commons Wikidata:Q688 Wiktionary
indexes by PT (page) v e

Data sets read by {{Infobox element}}
Name and identifiers	view edit
Symbol etymology (11 non-trivial)	view edit
Top image (caption, alt)	view edit
Pronunciation	view edit
Allotropes (overview)	view edit
Group (overview)	view edit
Period (overview)	view edit
Block (overview)	view edit
Natural occurrence	view edit
Phase at STP	view edit
Oxidation states	view edit
Spectral lines image	view edit
Electron configuration (cmt, ref)	view edit
Isotopes
Standard atomic weight	view edit
most stable isotope	view edit
Wikidata
Wikidata *	view edit
* Not used in {{Infobox element}} (2023-01-01) See also {{Index of data sets}} · Cat:data sets (12) · (this table: v )

References

^ "Standard Atomic Weights: Chlorine". CIAAW. 2009.
^ Prohaska, Thomas; Irrgeher, Johanna; Benefield, Jacqueline; Böhlke, John K.; Chesson, Lesley A.; Coplen, Tyler B.; Ding, Tiping; Dunn, Philip J. H.; Gröning, Manfred; Holden, Norman E.; Meijer, Harro A. J. (2022-05-04). "Standard atomic weights of the elements 2021 (IUPAC Technical Report)". Pure and Applied Chemistry. doi:10.1515/pac-2019-0603. ISSN 1365-3075.
^ Chlorine, Gas Encyclopaedia, Air Liquide
^ Ambrose, D; Hall, D.J; Lee, D.A; Lewis, G.B; Mash, C.J (1979). "The vapour pressure of chlorine". The Journal of Chemical Thermodynamics. 11: 1089–1094. doi:10.1016/0021-9614(79)90139-3.
^ Arblaster, John W. (2018). Selected Values of the Crystallographic Properties of Elements. Materials Park, Ohio: ASM International. ISBN 978-1-62708-155-9.
^ Magnetic susceptibility of the elements and inorganic compounds, in Lide, D. R., ed. (2005). CRC Handbook of Chemistry and Physics (86th ed.). Boca Raton (FL): CRC Press. ISBN 0-8493-0486-5.
^ Weast, Robert (1984). CRC, Handbook of Chemistry and Physics. Boca Raton, Florida: Chemical Rubber Company Publishing. pp. E110. ISBN 0-8493-0464-4.
^ ^8.0 ^8.1 Kondev, F. G.; Wang, M.; Huang, W. J.; Naimi, S.; Audi, G. (2021). "The NUBASE2020 evaluation of nuclear properties" (PDF). Chinese Physics C. 45 (3): 030001. doi:10.1088/1674-1137/abddae.

Lua error in mw.title.lua at line 229: too many expensive function calls.

[1] "Standard Atomic Weights: Chlorine". CIAAW. 2009.

[CIAAW2021-2] Prohaska, Thomas; Irrgeher, Johanna; Benefield, Jacqueline; Böhlke, John K.; Chesson, Lesley A.; Coplen, Tyler B.; Ding, Tiping; Dunn, Philip J. H.; Gröning, Manfred; Holden, Norman E.; Meijer, Harro A. J. (2022-05-04). "Standard atomic weights of the elements 2021 (IUPAC Technical Report)". Pure and Applied Chemistry. doi:10.1515/pac-2019-0603. ISSN 1365-3075.

[3] Chlorine, Gas Encyclopaedia, Air Liquide

[4] Ambrose, D; Hall, D.J; Lee, D.A; Lewis, G.B; Mash, C.J (1979). "The vapour pressure of chlorine". The Journal of Chemical Thermodynamics. 11: 1089–1094. doi:10.1016/0021-9614(79)90139-3.

[Arblaster_2018-5] Arblaster, John W. (2018). Selected Values of the Crystallographic Properties of Elements. Materials Park, Ohio: ASM International. ISBN 978-1-62708-155-9.

[6] Magnetic susceptibility of the elements and inorganic compounds, in Lide, D. R., ed. (2005). CRC Handbook of Chemistry and Physics (86th ed.). Boca Raton (FL): CRC Press. ISBN 0-8493-0486-5.

[7] Weast, Robert (1984). CRC, Handbook of Chemistry and Physics. Boca Raton, Florida: Chemical Rubber Company Publishing. pp. E110. ISBN 0-8493-0464-4.

[NUBASE2020-8] 8.0 ^8.1 Kondev, F. G.; Wang, M.; Huang, W. J.; Naimi, S.; Audi, G. (2021). "The NUBASE2020 evaluation of nuclear properties" (PDF). Chinese Physics C. 45 (3): 030001. doi:10.1088/1674-1137/abddae.

[1]

[2]

[3]

[4]

[5]

[6]

[7]

[8]