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=__//**Nitrogen.**//__=

History

 * Discovered by Daniel Rutherford in 1772

Location

 * Most common element in the atmosphere
 * found in proteins and many other organic compounds

Physical Properties

 * Freezing/melting point: -209.9 degrees C (-395.8 F)
 * Boiling/condensation point: -195.8 degrees C (-320.4 F)
 * Is a colorless, odorless gas
 * occurs naturally as a gas on earth
 * Is not found naturally as a liquid or solid
 * Most common gas in the Atmosphere

Chemical info

 * Two natural isotopes, N-14 (99.63%) and N-15 (0.37%)
 * Man mad isotopes include N-12, N-13, and N-16, all of which are radioactive
 * very low reactivity
 * nonmetal
 * in group 5a, the nitrogen group

Present Day Uses

 * used in ammonia and nitric acid
 * used in multiple oxides, including Nitrous Oxide, Nitric Oxide, and Nitrogen Dioxide. (Yes, Nitrous Oxide is nos.)
 * found in many photographic developers
 * found in morphine, caffeine, and quinine