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Oxygen

Gas without color, taste and smell, supports life and combustion. Upon reaction with other chemical elements form oxides. Heavier than air, is poorly soluble in water. The atmosphere contains 21% oxygen. Boiling oxygen -183 ° C. The main applications of oxygen based on its property of supporting combustion and life. Oxygen is widely used as a fuel gas in the melting furnace, for burning, for welding and cutting metals. In the chemical industry, oxygen is used as a raw material in the paper industry as a bleaching agent. In medicine, oxygen is widely used to maintain the life of patients and oxygen therapy.

Nitrogen

Incombustible gas, tasteless, odorless and colorless, unbreathable, slightly lighter than air, is poorly soluble in water. The atmosphere contains 78.1% nitrogen. The boiling point of -196 ° C nitrogen. Nitrogen has many commercial and technical applications. Liquid nitrogen is used for freezing food, blood, and other materials. Liquid nitrogen is also used to modify properties of the metal, the temperature control of chemical reactions in cosmetology and medicine. Nitrogen gas is used in metallurgy for the protection of metal coating or mixing in the food industry to create an inert atmosphere during processing and storage of foods.

Argon

Non-toxic gas is tasteless, colorless and odorless, heavier than air, is poorly soluble in water. The atmosphere contains 0.93% argon. argon boiling temperature -186 ° C. Industrially, argon is used in metallurgy for the protection of metals during welding, as well as for filling of gas discharge lamps.

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