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
Deeper Shade of Soul Deeper Shade of Soul "Deeper Shade of Soul" is the debut single by Dutch band Urban Dance Squad. It was taken from their debut album "Mental Floss for the Globe" and samples the Ray Barretto song he recorded in 1968 with a similar name ("A Deeper Shade of Soul"). Originally released in 1990, the single reached number 21 on the "Billboard" Hot 100 in March 1991 and stayed on the charts for 18 weeks. In the United States it is the song for which the band is best known, being their only hit single. A. Deeper Shade of Soul (4:28)