Nitrogen

Nitrogen is one of the most gas in the atmosphere because of its presence by as much as 78%, such as exists in the form of the shape of the molecule (N2) and nitrogen is used in the preparation of many chemicals such as ammonia and nitric acid compounds. Nitrogen is characterized as a non-metal, it has a point of $ (63) freezing Kelvin and condenses at a temperature of 77 Kelvin, and the electronic external cover has five electron and a three-parity in the majority of its compounds. Another of his characteristics, he also colorless, odorless and tasteless, so it can not distinguish between him and oxygen through these qualities, but could

be tested by ignition that oxygen helps characterized by turning on for the non-flammable nitrogen, or even help that although the distinction can be made between it and the second carbon dioxide through water-soluble, in which nitrogen is characterized by a solubility in water while difficult characterized Bzoubanh carbon dioxide in water. Nitrogen is used in the manufacture of fertilizers and nitric acid as the ammonia is used in their preparation primarily, and penetrates well as in the treatment of steel or liquid that reaches its temperature of -196 used in critical areas in terms of maintenance objects and budding cells and record vital samples of nitrogen, and the intervention as well as nitrogen compounds in preparing explosive materials and installation fertilizers and fertilizer. It also uses inflate tires are not affected due to the temperature change relative size and medically used to treat benign tumors of the skin, but it is not the active substance is used and in the atmosphere of explosive fluid reservoirs . Nitrogen enters the preparation of many chemical compounds that have enormous applications in various areas of life, which date many economic and industrial benefits of them, so it is considered one of the important elements of nitrogen chemistry industry development of reliable in their different areas.