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
Ella (name) Ella (name) In Greek mythology, Ella (Greek: Ἕλλα) was the daughter of Athamas and Nephele. The name may be a cognate with Hellas (Greek: Ἑλλάς), the Greek name for Greece, which said to have been originally the name of the region round Dodona. Another source indicates the name is a Norman version of the Germanic short name "Alia", which was short for a variety of German names with the element "ali"-, meaning "other." It is also a common short name for names starting with "El"-, such as Eleanor, Elizabeth, Elle, Ellen, Ellie, or Eloise. The Hebrew word Ella (אלה) has