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This element is an important element because without it how would we have table salt it is was used in the ww1 the element can be used to purify drinking water and to treat swimming pools. if we didn't have chlorine how could we swim in pools the pool could be filled with diseases. If it weren't for chlorine we wouldn't have our favorite salty oceans

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Chlorine was discovered in 1774 by Carl Wilhelm Scheele. He obtained it through the reaction of the mineral pyrolusite (manganese dioxide, MnO₂) with hydrochloric acid (HCl, then known as muriatic acid). ... Sir Humphry Davy proposed and confirmed chlorine to be an element in 1810, and he also named the element.

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Symbol: CI
Atomic number: 17
Atomic mass: 35.45
What class is Chlorine: Gas
Family: Halogens

Physical facts
Melting point: -101.5
Boiling point: -34.04
Density: 3.2 g/l

Chlorine can be found in abundance in both the Earth's crust and in ocean water. In the ocean, chlorine is found as part of the compound sodium chloride (NaCl), also known as table salt. In the Earth's crust, the most common minerals containing chlorine include halite (NaCl), carnallite, and sylvite (KCl).

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Chlorine - Element information, properties and uses | Periodic Table

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Element Chlorine (Cl), Group 17, Atomic Number 17, p-block, Mass 35.45. Sources, facts, uses, scarcity (SRI), podcasts, alchemical symbols, videos and images.

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isotopes: ³⁵Cl, ³⁷Cl
uses:
used to treat swimming pools.
used to purify drinking water.
used in salt that is used and spice to foods.
used in paper paper products, plastics, dyes, textiles, medicines, antiseptics, insecticides, solvents and paints.

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First World War tech: Chlorine Gas & Gas Masks

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Making table salt using sodium metal and chlorine gas