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chlorine 音标拼音: [kl'ɔrin] n. 氯 氯 chlorine n 1: a common nonmetallic element belonging to the halogens; best known as a heavy yellow irritating toxic gas; used to purify water and as a bleaching agent and disinfectant; occurs naturally only as a salt (as in sea water) [synonym: {chlorine}, {Cl}, {atomic number 17}] Chlorine \Chlo"rine\, n. [Gr. ? pale green, greenish yellow. So named from its color. See {Yellow}.] (Chem.) One of the elementary substances, commonly isolated as a greenish yellow gas, two and one half times as heavy as air, of an intensely disagreeable suffocating odor, and exceedingly poisonous. It is abundant in nature, the most important compound being common salt (Sodium chloride). It is powerful oxidizing, bleaching, and disinfecting agent. Symbol Cl. Atomic weight, 35.4. [1913 Webster] {Chlorine family}, the elements fluorine, chlorine, bromine, and iodine, called the {halogens}, and classed together from their common peculiarities. [1913 Webster] chlorine Symbol: Cl Atomic number: 17 Atomic weight: 35.453 Halogen element. Poisonous greenish-yellow gas. Occurs widely in nature as sodium chloride in seawater. Reacts directly with many elements and compounds, strong oxidizing agent. Discovered by Karl Scheele in 1774. Humphrey David confirmed it as an element in 1810.
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