Period 3 element 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 second most abundant halogen and 21st most abundant chemical element in Earth's crust. The great oxidizing potential of chlorine led it to its 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 pools to keep them clean and sanitary. In the upper atmosphere, chlorine-containing molecules such as chlorofluorocarbons have been implicated in ozone depletion. "Argon" (symbol
Greek name name James is a derivative of Ἰάκωβος/ Iakovos. Greek family names are most commonly patronymics but may also be based on occupation, personal characteristics or location. The [[feminine gender|feminine]] version is usually the [[genitive case|genitive]] of the family name of the woman's father or husband; so, for example, Mr. Yannatos and Mrs. [[Savina Yannatou|Yannatou]]. As a result of their codification in the Modern Greek state, surnames have [[Katharevousa]] forms even though Katharevousa is no longer the official standard. Thus, the Ancient Greek name Eleutherios forms the Modern Greek proper name Lefteris. In the past, people in speaking used the family