Revision as of 00:25, 16 December 2020 by imported>Monkbot
[[Category:Template:Pagetype with short description]]
Chlorine, 17Cl |
Chlorine |
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Pronunciation | (Template:Respell) |
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Appearance | pale yellow-green gas |
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Standard atomic weight Ar, std(Cl) | [[[:Template:Val]], Template:Val] conventional: Template:Val |
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Chlorine in the periodic table |
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Atomic number (Z) | 17 |
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Group | group 17 (halogens) |
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Period | period 3 |
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Block | p-block |
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Electron configuration | [Ne] 3s2 3p5 |
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Electrons per shell | 2, 8, 7 |
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Physical properties |
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Phase at STP | gas |
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Melting point | (Cl2) 171.6 K (−101.5 °C, −150.7 °F) |
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Boiling point | (Cl2) 239.11 K (−34.04 °C, −29.27 °F) |
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Density (at STP) | 3.2 g/L |
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when liquid (at b.p.) | 1.5625 g/cm3[1] |
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Critical point | 416.9 K, 7.991 MPa |
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Heat of fusion | (Cl2) 6.406 kJ/mol |
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Heat of vaporization | (Cl2) 20.41 kJ/mol |
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Molar heat capacity | (Cl2) 33.949 J/(mol·K) |
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Vapor pressure
P (Pa)
|
1
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10
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100
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1 k
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10 k
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100 k
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at T (K)
|
128
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139
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153
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170
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197
|
239
|
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Atomic properties |
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Oxidation states | −1, +1, +2, +3, +4, +5, +6, +7 (a strongly acidic oxide) |
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Electronegativity | Pauling scale: 3.16 |
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Ionization energies | - 1st: 1251.2 kJ/mol
- 2nd: 2298 kJ/mol
- 3rd: 3822 kJ/mol
- (more)
|
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Covalent radius | 102±4 pm |
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Van der Waals radius | 175 pm |
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Spectral lines of chlorine |
Other properties |
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Natural occurrence | primordial |
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Crystal structure | orthorhombic |
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Speed of sound | 206 m/s (gas, at 0 °C) |
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Thermal conductivity | 8.9×10−3 W/(m·K) |
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Electrical resistivity | >10 Ω·m (at 20 °C) |
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Magnetic ordering | diamagnetic[2] |
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Magnetic susceptibility | −40.5·10−6 cm3/mol[3] |
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CAS Number | Cl2: 7782-50-5 |
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History |
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Discovery and first isolation | Carl Wilhelm Scheele (1774) |
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Recognized as an element by | Humphry Davy (1808) |
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Main isotopes of chlorine |
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Category: Chlorine | references |
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References
These references will appear in the article, but this list appears only on this page.
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