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Chlorine
Chemical Properties & Compounds
| Symbol | Atomic Number | Atomic Weight | Melting Point | Boiling Point | Phase | Density | Classification |
| Cl | 17 | 35.453 | -101.5 °C | -34.04 °C | Gas | 3.2 g/L | Non-Metal  |
|
|
|
| General |
| Name, symbol, number |
chlorine, Cl, 17 |
| Chemical series |
halogens |
| Group, period, block |
17, 3, p |
| Appearance |
yellowish green
 |
| Standard atomic weight |
35.453(2) g·mol−1 |
| Electron configuration |
[Ne] 3s2 3p5 |
| Electrons per shell |
2, 8, 7 |
| Physical properties |
| Phase |
gas |
| Density |
(0 °C, 101.325 kPa)
3.2 g/L |
| Melting point |
171.6 K
(-101.5 °C, -150.7 °F) |
| Boiling point |
239.11 K
(-34.04 °C, -29.27 °F) |
| Critical point |
416.9 K, 7.991 MPa |
| Heat of fusion |
(Cl2) 6.406 kJ·mol−1 |
| Heat of vaporization |
(Cl2) 20.41 kJ·mol−1 |
| Heat capacity |
(25 °C) (Cl2)
33.949 J·mol−1·K−1 |
Vapor pressure
| P/Pa |
1 |
10 |
100 |
1 k |
10 k |
100 k |
| at T/K |
128 |
139 |
153 |
170 |
197 |
239 |
|
| Atomic properties |
| Crystal structure |
orthorhombic |
| Oxidation states |
±1, 3, 5, 7
(strongly acidic oxide) |
| Electronegativity |
3.16 (Pauling scale) |
Ionization energies
(more) |
1st: 1251.2 kJ·mol−1 |
| 2nd: 2298 kJ·mol−1 |
| 3rd: 3822 kJ·mol−1 |
| Atomic radius |
100 pm |
| Atomic radius (calc.) |
79 pm |
| Covalent radius |
99 pm |
| Van der Waals radius |
175 pm |
| Miscellaneous |
| Magnetic ordering |
nonmagnetic |
| Electrical resistivity |
(20 °C) > 10Ω·m |
| Thermal conductivity |
(300 K) 8.9 m W·m−1·K−1 |
| Speed of sound |
(gas, 0 °C) 206 m/s |
| CAS registry number |
7782-50-5 |
| Selected isotopes |
|
|
| References |
|
Chlorine Compounds
|
Source: Wikipedia article Chlorine
|
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Chemistry Quick Facts
