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Baris 137: [[Berkas:Chlorine ampoule.jpg\|right\|200px\|Klor dalam ampul\|thumb]] {{Main\|Klor}} ~~''Klor'' (simbol '''Cl''') adalah [[halogen]] terterang kedua, yang ditemukan dalam [[tabel periodik]] dalam [[kelompok 17]].~~ {{unsur\|Klor\|Cl\|17}} Ia merupakan [[halogen]] paling ringan kedua, yang dijumpai dalam [[tabel periodik]] dalam [[Unsur golongan 17\|golongan 17]]. Unsur ini membentuk molekul diatomik pada [[kondisi standar]], yang disebut diklorin. Ia mempunyai [[afinitas elektron]] tertinggi dan [[elektronegativitas]] ketiga tertinggi di antara seluruh unsur. Berdasarkan alasan ini, klor adalah [[oksidator]] kuat. ~~<!-- === Chlorine ===~~ ~~{{Main\|Chlorine}}~~ ''Chlorine'' (symbol '''Cl''') is the second lightest [[halogen]], found in the [[periodic table]] in [[group 17]]. The element forms diatomic molecules under [[standard conditions]], called dichlorine. It has the highest [[electron affinity]] and the third highest [[electronegativity]] of all the elements; for this reason, chlorine is a strong [[oxidizing agent]]. Senyawa klor yang paling umum adalah [[natrium klorida]], yang telah dikenal sejak zaman purba; namun baru pada tahun 1630 gas klor diperoleh oleh kimiawan sekaligus fisikawan Belgia [[Jan Baptist van Helmont]]. The most common compound of chlorine, sodium chloride, has been known since ancient times; however, around 1630, chlorine gas was obtained by the Belgian chemist and physician Jan Baptist van Helmont. The synthesis and characterization of elemental chlorine occurred in 1774 by Swedish chemist Carl Wilhelm Scheele, who called it "dephlogisticated muriatic acid air," having thought he synthesized the oxide obtained from the [[hydrochloric acid]], because acids were thought at the time to necessarily contain oxygen, a number of chemists, including Claude Berthollet, suggested that Scheele's dephlogisticated muriatic acid air must be a combination of oxygen and the yet undiscovered element, and Scheele named the supposed new element within this oxide as ''muriaticum.'' The suggestion that this newly discovered gas was a simple element was made in 1809 by Joseph Louis Gay-Lussac and Louis-Jacques. This was confirmed by Sir Humphry Davy in 1810, who named it chlorine, from the Greek word χλωρος (chlōros), meaning "green-yellow."▼ ▲~~The most common compound of chlorine, sodium chloride, has been known since ancient times; however, around 1630, chlorine gas was obtained by the Belgian chemist and physician Jan Baptist van Helmont.~~<!-- The synthesis and characterization of elemental chlorine occurred in 1774 by Swedish chemist Carl Wilhelm Scheele, who called it "dephlogisticated muriatic acid air," having thought he synthesized the oxide obtained from the [[hydrochloric acid]], because acids were thought at the time to necessarily contain oxygen, a number of chemists, including Claude Berthollet, suggested that Scheele's dephlogisticated muriatic acid air must be a combination of oxygen and the yet undiscovered element, and Scheele named the supposed new element within this oxide as ''muriaticum.'' The suggestion that this newly discovered gas was a simple element was made in 1809 by Joseph Louis Gay-Lussac and Louis-Jacques. This was confirmed by Sir Humphry Davy in 1810, who named it chlorine, from the Greek word χλωρος (chlōros), meaning "green-yellow." Chlorine is a component of various compounds, including [[table salt]]. It is the [[Abundance of elements in Earth's crust\|second most abundant halogen and 21st most abundant chemical element]] in Earth's crust. The great oxidizing potential of chlorine led it to its [[Bleach (chemical)\|bleaching]] and disinfectant uses, as well as uses of an essential reagent in the chemical industry. As a common disinfectant, chlorine compounds are used in [[swimming pool]]s to keep them clean and [[swimming pool sanitation\|sanitary]]. In the [[upper atmosphere]], chlorine-containing molecules such as [[chlorofluorocarbons]] have been implicated in [[ozone depletion]]. -->

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