Chlorine is a chemical element of the halogen family, with the symbol Cl. It is one of the most reactive elements in the periodic table of the elements and is very common in nature in the chemical form combined under the name of chloride ions. or carbonates.

Chlorine is a colorless and very toxic gas. It has a melting point of -100.98°C and a boiling point of 34.6°C. It is one of the most reactive elements in the periodic table of elements.

Chlorine is a strong oxidant and can react with a large number of organic and inorganic compounds to form chlorine compounds. It is extremely reactive with metals and alkaline salts, forming chlorides. Chlorine has a strong, acrid, characteristic odor.

Chlorine is widely used as a strong disinfectant and is used to kill bacteria and viruses in drinking water, waste water and swimming pools. It is also used in the food industry for bleaching products such as sugar, flours and cereals. In addition, chlorine is used as a chemical reagent for the manufacture of polychlorinated biphenyls (PCBs) and chlorofluorocarbons (CFCs).

35.452

-1
1
2
3
4
5
6
7

[Ne] 3s2 3p5

2
8
7

3.16

12.9676

Synthetic

Radioactive

Liquid

Gaseous

Electronic configuration diagram

Characteristics

Name	Chlorine
Number	17
Atomic	35.452
Symbol	Cl
Fusion	-101
Boiling	-34.6
Density	0.003214
Period	3
Group	17

Discovery	1774 Scheele
Abundance	145
Radius	0.97
Electronegativity	3.16
Ionization	12.9676
Number of isotopes	11
Electronic configuration	[Ne] 3s2 3p5
Oxidation states	-1,1,2,3,4,5,6,7
Electron by energy level	2,8,7

Minerals containing this element : 422

Mineral	Hardness	Density
Abhurite	2.00 / 2.00	4.29
Acmonidesite
Adranosite
Adranosite-(Fe)		2.20
Adrianite
Afghanite	5.50 / 6.00	2.55
Aiolosite		3.59
Akaganeite		3.00
Alexkhomyakovite
Alforsite	5.00 / 5.00	4.73
Allochalcoselite	3.00 / 4.00	4.65
Alloriite	5.00 / 5.00	2.35
Alluaivite	5.00 / 6.00	2.76
Altisite	6.00 / 6.00	2.64
Ammineite
Amstallite	4.00 / 4.00	2.40
Anatacamite	4.00 / 4.50
Anhydrokainite
Antarcticite	2.00 / 3.00	1.71
Anthonyite	2.00 / 2.00
Aqualite	4.00 / 5.00	2.66
Ardaite	2.50 / 3.00	6.00
Argesite		2.84
Arsmirandite
Arzakite	2.00 / 2.50	7.64
Arzrunite
Ashburtonite		4.69
Asisite	3.50 / 3.50	8.00
Atacamite	3.00 / 3.50	3.76
Atlasovite	2.00 / 2.50	4.20
Aubertite	2.00 / 3.00	1.82
Aurivilliusite		8.96
Avdoninite	3.00 / 3.00	3.03
Averievite	4.00 / 4.00	3.54
Backite	2.00 / 3.00	5.57
Balliranoite
Bandylite	2.50 / 2.50	2.81
Baotite	6.00 / 6.00	4.42
Barahonaite-(Al)
Barahonaite-(Fe)		3.03
Barstowite	3.00 / 3.00	5.50
Belloite	1.00 / 2.00	3.79
Bideauxite	3.00 / 3.00	6.27
Bischofite	1.50 / 2.00	1.56
Bismoclite	2.00 / 2.50	7.72
Bleasdaleite	2.00 / 2.00
Blixite	3.00 / 3.00	7.35
Bluebellite	1.00 / 1.00	4.75
Bluelizardite	2.00 / 2.00	3.12
Bobkingite	3.00 / 3.00	3.25
Bobmeyerite		4.38
Boleite	3.00 / 3.50	4.80
Boracite	7.00 / 7.00	2.90
Botallackite		3.60
Brearleyite
Brianroulstonite	5.00 / 5.00	1.97
Brokenhillite	4.00 / 5.00	3.00
Brontesite		2.73
Burnsite	1.00 / 1.50
Buttgenbachite	3.00 / 3.00	3.42
Cadwaladerite		1.66
Calclacite		1.00
Calomel	1.50 / 2.00	6.40
Calumetite	2.00 / 2.00
Capgaronnite		6.19
Caracolite	4.50 / 4.50	5.10
Carbokentbrooksite	5.00 / 5.00	3.14
Carnallite	2.50 / 2.50	1.60
Centennialite
Cerchiaraite-(Al)	4.50 / 4.50	3.64
Cerchiaraite-(Fe)	4.50 / 4.50	3.71
Cerchiaraite-(Mn)	4.00 / 5.00
Challacolloite	2.00 / 3.00	4.77
Chambersite	7.00 / 7.00	3.49
Chanabayaite	2.00 / 2.00	1.46
Chelkarite		1.00
Chloraluminite		1.67
Chlorapatite	5.00 / 5.00
Chlorargyrite	1.00 / 1.50	5.55
Chlorartinite		1.87
Chlorbartonite	4.00 / 4.00	3.70
Chlorkyuygenite	5.00 / 5.50	2.94
Chlormagaluminite	1.50 / 2.50	1.98
Chlormanganokalite	2.50 / 2.50	2.31
Chlormayenite
Chloro-potassic-ferro-edenite
Chlorocalcite	2.50 / 3.00
Chloromagnesite		2.33
Chloromenite	1.50 / 2.50
Chlorothionite	2.50 / 2.50	2.69
Chloroxiphite	2.50 / 2.50	6.76
Choloalite	3.00 / 3.00	6.40
Chrysothallite		2.97
Chubarovite	2.00 / 2.00	2.72
Claringbullite		3.90
Clinoatacamite	3.00 / 3.00	3.71
Cobaltogordaite
Comancheite	2.00 / 2.00	7.70
Congolite	6.50 / 7.50	3.58