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
A Whiter Shade of Pale out that there were no time limits to copyright claims under English law. The right to future royalties was therefore returned to Fisher. Both the musicological basis of the judgment and its effect on the rights of musicians who contribute composition to future works have drawn some attention in the music world. "A Whiter Shade of Pale" was covered by Annie Lennox for her 1995 album "Medusa". It was released as the second single in May 1995 and became a top-forty hit in Europe and Canada. A Whiter Shade of Pale "A Whiter Shade of Pale" is the debut single