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
Shade (comics) that has lasted more than one hundred and fifty years. Another notable point during the series' run came when the Godwave struck the DC universe, depowering almost all superheroes. In a confrontation between Starman, Matt O'Dare, Green Lantern, and The Infernal Doctor Pip, in which Pip almost blows up a large section of an Opal skyscraper, Shade appears at the last minute and draws Pip into the Darklands, which serve as his power source, before the bomb can explode. At various times, Culp is able to take control over or subtly influence Shade. At one point, Culp takes full control