Chlorine
Uses, Properties, & Facts
chlorine
chlorine (Cl), chemical element, the second lightest member of the halogen elements, or Group 17 (Group VIIa) of the periodic table. Chlorine is a toxic, corrosive, greenish yellow gas that is irritating to the eyes and to the respiratory system.
atomic number | 17 |
---|---|
atomic weight | 35.446 to 35.457 |
melting point | −103 °C (−153 °F) |
boiling point | −34 °C (−29 °F) |
density (1 atm, 0 °C or 32 °F) | 3.214 g/litre (0.429 ounce/gallon) |
oxidation states | −1, +1, +3, +5, +7 |
electron configuration | 1s22s22p63s23p5 |
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