This comprehensive guide provides a thorough overview of chlorine, a chemical element found in nature that has a wide range of uses. It covers the history and properties of chlorine, its various forms, and its applications in industry, agriculture, and
Chlorine is a chemical element; it has symbol Cl and atomic number 17. The second-lightest of the halogens, it appears between fluorine and bromine in the periodic table and its properties are mostly intermediate between them. Chlorine is a yellow-green gas at room temperature. It is an extremely reactive element and a strong oxidising agent: among the elements, it has the highest electron affinity and the third-highest electronegativity on the revised Pauling scale, behind only oxygen and fluorine.