Cl - Chlorine

A green, highly reactive gas, chlorine is the most abundant halogen, comprising nearly two percent of the seas. Karl Scheele discovered chlorine in 1774, but believed it to be an oxide of a ficticous element, murium (which is why hydrochloric acid is also known as muriatic acid.) Murium was never found, but Humphrey Davy recognized it's elemental quality in 1810.

Atomic number - 17 Density g/mL 0 .000317
Atomic weight u 35 .453 Melting point K 172 .16
Bonding radius A 0 .99 Boiling point K 239 .1
Atomic radius A 0 .97 Heat of vaporization kJ/mol 10 .2
Ionization Potential V 12 .967 Heat of fusion kJ/mol 3 .203
Electronegativity - 3 .16 Specific heat J/gK 0 .48
The oxide is a strong acid.
Crystal are orthorhombic.

Electron config. : [Ne] 3s2 3p5


 Isotopes of Cl: Click mass number for decay process, product for element page.

 

031
150 msec
EC/ECp,11.980
S-31/P-30
30.992420 		032
298 msec
EC/ECa/ECp,12.685
S-32/Si-28/P-31
31.985688 		033
2.511 sec
EC,5.583 MeV
S-33
32.977451 		034
1.5264 sec
EC,5.492 MeV
S-34
33.973763 		035 75.77%

Stable

34.968852 		036
3.01E+5 yr
B-/EC,10.413
Ar-36/S-36
35.968306 		037 24.23%

Stable

36.965902
038
37.24 min
B-,4.917 MeV
Ar-38
37.968010 		039
55.6 min
B-,3.442 MeV
Ar-39
38.968008 		040
1.35 min
B-,7.480 MeV
Ar-40
39.970413 		041
38.4 sec
B-,5.730 MeV
Ar-41
40.970649 		042
6.8 sec
B-,9.430 MeV
Ar-42
41.973172 		043
3.3 sec
B-,7.950 MeV
Ar-43
42.974202 		044
0.43 sec
B-/B-n,3.920
Ar-44/Ar-43
43.978539
045
400 msec
B-/B-n,10.800
Ar-45/Ar-44
44.979710 		046
0.22 sec
B-/B-n,6.900
Ar-46/Ar-45
45.984111 		047
200 nsec
B-/B-n,14.700
Ar-47/Ar-46
46.987976 		MASS abund.
Halflife
Particle, Energy
Decay Product(s)
Isotopic Mass