Chlorine         Chlorine is (at room temperature) a greenish-yellow gas that can be readily liquefied at 5170 Tarr or 6.8 atmospheres, at 20 C (68 F), and has a very disagreeable odor. It's Element Symbol is Cl, atomic number is 17, and atomic mass is 35.453. Chlorine's melting point is -101 C or 149.8 F. The boiling point is -34.05 C or -29.29 F, at one atmosphere pressure. Chlorine is a member of the halogen group. Chlorine was discovered by Swedish scientist Karl …showed first 75 words of 501 total…

…showed last 75 words of 501 total…hydrogen chloride (a colorless, corrosive, nonflammable gas with a penetrating, suffocating odor.) . Bibliography · Microsoft ® Encarta. Copyright © 1994 Microsoft Corporation. Copyright © 1994 Funk & Wagnalls Corporation. · Asimov, Isaac, Building Blocks of the Universe, rev. ed. (1974); Downs, A. J., The Chemistry of Chlorine, Bromine, Iodine and Astatine (1975); Hamilton, E. I., The Chemical Elements and Man (1978); Nechamkin, Howard, Chemistry of the Elements (1968); Ruben, Samuel, Handbook of the Elements, 2d ed. (1967; repr. 1985); Trifonov, D. N., Chemical Elements: How They Were Discovered (1985).