Nitrogen is the most abundant element in the air and a chemical element in living things. Its chemical symbol is N and atomic number is 7, which is one of the basic elements of amino acids. Nitrogen and its compounds are widely used in production and life. The relative atomic mass of n is 14.006, and the atomic number is 7.
physical features
1 does not react with air, alkali and water at room temperature. When heated to 3273K, only 0. 1% decomposes. Therefore, N2 is a chemical characteristic substance, and the most important mineral of nitrogen is nitrate. There are two natural isotopes of nitrogen: nitrogen 14 and nitrogen 15, of which the abundance of nitrogen 14 is 99.625%.
2. Crystal structure: the unit cell is hexagonal.
3. Element type: nonmetallic elements.
Nitrogen is a colorless and odorless gas. The common elemental form of nitrogen is nitrogen. Colorless, odorless and odorless, it is a chemically inert gas, which is difficult to react chemically and does not support combustion.
5. Main components: high-purity nitrogen ≥ 99.999%; Industrial level ≥ 99.5%; Grade Ⅱ ≥98.5%.
6. Colorless and odorless gas.
7. Solubility: Slightly soluble in water and ethanol.
8. Main uses: used in the production of synthetic ammonia and nitric acid, as a material protective agent and refrigerant.
Refer to the above content: Baidu Encyclopedia-Nitrogen atom