Nitrogen

Name:	Nitrogen
Symbol:	N
Atomic Number:	7

Nitrogen is the seventh element in the periodic table. Nitrogen naturally occurs as a colorless and odorless gas, generally considered to be inert. As a liquid, it is also colorless and odorless, and is similar in appearance to water.

Nitrogen makes up 78% of Earth's atmosphere by volume. The compounds made of nitrogen, combined with other elements, are so active as to be most important in foods, poisons, fertilizers, and explosives.

See also

• Nitrogen narcosis
• "The bends"
• Nitrogen cycle

Nitrogen occurs in many forms and compounds:

• Ammonia
• Brizeen nitrate
• Liquid nitrogen
• Nitrate
• Nitrogen oxide
• Nitrogen tetroxide
• Nitric acid
• Nitrogenated soil
• Nitrogenase compounds
• Potassium nitrate
• Rhodium nitrite
• Tri-nitrogen chloride

Liquid nitrogen was used for many visual effects on Star Trek; see Star Trek: The Magazine Volume 1, Issue 9.

References

• TOS:
  • "The Cage" and "The Menagerie, Part I" – Talos IV had a class M oxygen/nitrogen atmosphere.
  • "The Galileo Seven" – Taurus II had a class M oxygen/nitrogen atmosphere.
  • "Miri" – Miri had a class M oxygen/nitrogen atmosphere exactly identical to Earth, down to continental arrangements and lifeforms.
  • "Metamorphosis" – The asteroid in the Gamma Canaris region had a class M oxygen/nitrogen atmosphere, with some krypton, argon, and neon. It was practically identical to Earth.
  • "Who Mourns for Adonais?" – Pollux IV had a class M oxygen/nitrogen atmosphere.
  • "Bread and Circuses" – 892-IV was nearly identical to Earth, with different shaped landmasses, with a class M oxygen/nitrogen (21%/78%) atmosphere.
  • "The Ultimate Computer" – Alpha Carinae II had a class M oxygen/nitrogen atmosphere.
  • "Return to Tomorrow" – Arret's sealed chamber had a class M oxygen/nitrogen atmosphere.
  • "The Deadly Years" – Gamma Hydra IV had a class M oxygen/nitrogen atmosphere and normal mass.
  • "The Empath" – McCoy experienced "the bends" - nitrogen bubbles in his blood.
  • "The Savage Curtain" – A select area of Excalbia formed a class M oxygen/nitrogen atmosphere.
  • "Spock's Brain" – Sigma Draconis VI's underground installations had a class M oxygen/nitrogen atmosphere.
• TNG:
  • "When The Bough Breaks" – An atmospheric N₂ drop was not responsible for the Aldeans' sterility.
  • "Hollow Pursuits" – The crew is transporting gaseous nitrogen containers, and later use liquid nitrogen in the warp core.
  • "The Royale" – Theta VIII's atmosphere is "nasty," according to Geordi La Forge, consisting of liquid neon, methane, and nitrogen.
  • "Evolution" – The bridge accidentally floods with nitrogen oxide.
  • "Clues" – The Paxans' homeworld had a class M oxygen/nitrogen atmosphere.
  • "Timescape" – Picard's temporal narcosis was likened to nitrogen narcosis.
• DS9:
  • "The Passenger" - Major Kira Nerys used a fire extinguisher filled with nitrogen to extinguish the fire aboard the Kobliad transport Reyab.
  • "The Jem'Hadar" – The planet had a class M oxygen/nitrogen atmosphere.
  • "Things Past" – Tri-nitrogen chloride is a compound used in plasma grenades.
  • "Improbable Cause" – The Yalosians' ambassador required an atmosphere of 60% nitrogen, 10% benzene, and 30% hydrogen fluoride.
• VOY:
  • "Parallax" – Kes used nitrogenated soil to start the airponics bay.
  • "Phage" – The USS Voyager discovered a planetoid with caverns containing an oxygen-nitrogen atmosphere.
  • "Elogium" – Nitrogenated soil.
  • "Threshold" – The Doctor set up an environment for Tom Paris containing 80% nitrogen and 20% acidichloride.
  • "Basics, Part I" – Nitrogen tetroxide fumes were detected on Teirna's shuttle.
  • "Coda" – Janeway and Chakotay were collecting nitrogenase compounds.
• ENT:
  • "Fight or Flight" – The Axanar people breathed a nitrogen-methane mixture.
  • "Strange New World" – Trip Tucker once experienced nitrogen narcosis on Titan.

External link

• Nitrogen at Wikipedia