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Nitrogen was isolated by the British physician Daniel Rutherford in 1772 and recognized as an elemental gas by the French chemist Antoine Laurent Lavoisier about 1776.

Properties
Nitrogen is a colorless, odorless, tasteless, nontoxic gas. It can be condensed into a colorless liquid, which can in turn be compressed into a colorless, crystalline solid. Nitrogen exists in two natural forms of isotopes, and four radioactive isotopes have been artificially prepared. Nitrogen melts at -210.01° C (-346.02° F), boils at -195.79° C (-320.42° F), and has a density of 1.251 g/liter at 0° C (32° F). The atomic weight of nitrogen is 14.007.

Nitrogen is obtained from the atmosphere by passing air over heated copper or iron. The oxygen is removed from the air, leaving nitrogen mixed with some inert gases. Pure nitrogen is obtained by partial evaporation of liquid air because liquid nitrogen has a lower boiling point than liquid oxygen, the nitrogen evaporates off...

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Title: Nitrogen
Approximate word count: 523
Approximate pages: 3 (250 words per double-spaced page)

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1. Nitrogen
   

   Nitrogen. Nitrogen was isolated by ... Laurent Lavoisier about 1776. Properties
   Nitrogen is a colorless, odorless, tasteless, nontoxic gas. ...

2. Nitrogen
   

   Nitrogen. Nitrogen was isolated by ... Laurent Lavoisier about 1776. Properties
   Nitrogen is a colorless, odorless, tasteless, nontoxic gas. ...

3. The Nitrogen Cycle
   

   The Nitrogen Cycle. The Nitrogen Cycle The Nitrogen cycle is the exchange of
   nitrogen gas in the earth's atmosphere and living organism's. ...

4. Nitrogen Fixation
   

   Nitrogen fixation. The ... constituents. There is an abundant supply of nitrogen
   in the earth's atmosphere - nearly 79% in the form of N2 gas. ...

5. Nitrogen Cycle
   

   Nitrogen Cycle. ... The first step in this process is nitrogen being released from
   the amino acid. This process is known as ammonification. ...