Nitrogen is nonmetallic, odorless, colorless, and tasteless gas. Nitrogen makes up
             about 78% of the earth's atmosphere. Rutherford discover nitrogen in 1772. On the
             periodic table of elements Nitrogen is diatomic and has the chemical symbol of "N". The
             atomic number is 7, and its atomic weight is 14. There are 7 protons, neutrons, and
             electrons in a nitrogen atom. The gas can be condensed in liquid state that has a boiling
             point of -195.8 degrees celcius or froze at -209.9 degrees celcius. Even though nitrogen
             does not combine easily with other elements, the atoms are parts of many chemical
             There are many uses of nitrogen. Manufacturers can obtain pure nitrogen by
             making liquid air. After that they separate the nitrogen from the oxygen and other gases in
             air by distillation. After distilled nitrogen is collected under pressure in specially designed
             metal containers. The most important use of nitrogen is in the production of ammonia
             (NH3). Ammonia is used as a fertilizer, as a refridgerant, and in the production of nitric
             acid and other chemicals. Nitrogen compounds are also important to the making of drugs,
             dyes, explosives, poisons, and synthetic fibers.
             Nitrogen is one of the most important elements on the periodic table. All
             organisms must have nitrogen to live. Proteins are formed of amino acids, which nitrogen
             is part of all the amino acids. Nitrogen is always being removed from the air and teturned
             to it in a series of chemical reactions known as the nitrogen cycle. The nitrogen cycly is
             the circulation of nitrogen among the atmosphere, the soil and water, and the plants and
             animals of the earth. People influence the nitrogen cycle, but it is harmful to the
             atmosphere. The use of nitrogen fertilizers adds nitrogen to the soil, and then rain water
             carries unused fertilizer and other nitrogen compounds into streams and lakes, where the
             ...