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Stephanie Lopez

Stephanie Lopez. About nitrogen. Tasteless, colorless, and unscented gas. Symbol “N” found in the periodic table Atomic number “7” makes up 78 % volume and 75 % of the weight of Earth’s atmosphere. does not combine with other elements. Dissolves in water. 

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Stephanie Lopez

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  1. Stephanie Lopez

  2. About nitrogen • Tasteless, colorless, and unscented gas. • Symbol “N” found in the periodic table • Atomic number “7” • makes up 78 % volume and 75 % of the weight of Earth’s atmosphere. • does not combine with other elements. • Dissolves in water.  • Discovered by Daniel Rutherford. (1772) First called it “Noxious air” and “Fixed air”. • Renamed by Jean-Antoine Chaptal (1790) • Can be found in all living organisms.

  3. Properties • A non-metal element. • almost an “inert” diatomic gas. (Halogen) • Trivalent with most compounds, since it has 5 electrons in its outer shell. • Density of N in STP: 1 mol = 22.4 L mass of N2 is 28.0 g/mol 28.0 g/22.4 L = 1.25 g/L • Freezing Point -210°C • Turns into a liquid at -195.8°C , • liquid density (at boiling point) 0.808 g·cm−3

  4. Nitrogen is commonly produced by fractional distillation of gaseous air, in factories. • Also laboratories mix an aqueous solution of ammonium chloride with sodium nitrite.

  5. Industrial World and our homes. • Found in most light bulbs; nitrogen substitutes argon. (saves money!) • Preserves packaged foods. • Nitrogen is also found in computer CPUs. • Carbon dioxide was replaced by nitrogen in paintball guns. • Found in many electric parts like transistors, diodes, and circuits. • Stainless steel contains nitrogen. Nitrogen helps the steel become more resistant to oxidization. • Explosives like Trinitrotoluene (TNT) are used in a restricted manner for demolish a buildings without destroying other buildings close by. • Nitrous oxide is also used in motor racing to increase the power of the engine.

  6. Pharmaceutical and Agriculture • An essential ingredient for all fertilizers. (Promotes plant growth) • Nitrous oxide (laughing gas N2O) is used in hospitals and dental clinics as an anesthetic. • Since liquid nitrogen is extremely cold it is used to remove unwanted tissues and warts. • Liquid nitrogen is used to preserve blood and reproductive cells. (Cryopreservation) • Found in almost every major drug and antibiotics. • However too much NO2 in our air (from many factories) can be very harmful to plants, and people.

  7. Sites Credited • http://www.buzzle.com/articles/nitrogen-uses.html • http://science.howstuffworks.com/nitrogen-info.htm • http://en.wikipedia.org/wiki/Nitrogen • http://www.epa.gov/ttn/naaqs/standards/nox/s_nox_index.html • http://www.nbcnews.com/science/national-parks-being-hit-hard-nitrogen-based-air-pollution-8C11391275

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