[Chemical Knowledge]：What is Chlorine?

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Chlorine is a chemical element with atomic number 17 and symbol Cl. It is a halogen of the seventh period and is one of the common elements. Chlorine is a widespread element on Earth. It is found in salt form in seawater and can also be found in soluble chlorine salt minerals. A large number of applications of

chlorine are disinfectants and disinfection water, often used in health care, water treatment, food production and other fields. At the same time, chlorine compounds are also widely used in the production of pigments, dyes, fertilizers, medicines and other chemical products.

In the laboratory, chlorine is often used as a reagent for chemical reactions. It usually exists in the form of two atoms combined into a gas molecule, and it is easily dropped into chemical substances to participate in chemical reactions.

However, chlorine also has some negative effects. Chlorine is very toxic. When inhaled at high concentrations, it can cause allergic reactions, damage and damage to the eyes, respiratory tract and lungs, and even cause serious respiratory system diseases.

In addition to the above applications and effects, chlorine has other special properties and characteristics, which will be introduced one by one below.

physical properties

chlorine is a diatomic molecule with the chemical symbol Cl2. It is a yellowish-green gas with a pungent, toxic odor, denser than air, but insoluble in water. It has a lower boiling point and higher gas pressure. Its boiling point under standard conditions is -34.05°C and its density is 3.214g/L.

chlorine has strong oxidation. Under certain conditions, it can burn to produce a green flame, and it can be accompanied by some explosive properties. It also has good solubility and can be dissolved in many organic liquids.

chemical properties

chlorine is an active element, with good activity, can easily form alkali metals and items and low such as the earth most common metal chloride, usually used for mineral extraction and precious metal smelting work.

chlorine is one of the most active elements in the halogen family. Chlorine has a very strong reactivity and can react with many metallic and non-metallic elements. It can be combined with hydrogen, oxygen, sulfur, iodine and other elements into different compounds.

chlorine in the most widespread use of water treatment, detergents and bleaching powder and other cleaning products are usually containing chlorine compounds, these cleaning products attempt to achieve the cleaning process through the oxidation of chloride ions. Chlorine gas is also frequently used for disinfection.

In the field of medicine, ammonium chloride, which is easily soluble in water, is a good medicine because chloride ions are toxic and can help drugs come to multiple parts of the body and enhance their efficacy.