Nitrogen Facts

Nitrogen Facts
Nitrogen (N) has an atomic number of seven and makes up about 78.05% of the Earth's atmosphere by volume. It is an odorless, colorless, and mostly inert gas, and continues to be colorless and odorless at a liquid state.
Interesting Nitrogen Facts:
Nitrogen is believed to be the seventh most abundant element in the universe.
At normal pressure, nitrogen liquifies at 77 K (-195.79 °C) and freezes at 63 K (-210.01 °C).
Liquid nitrogen boils at -195.8 degrees Celsius.
Due to its volatility, it is a fairly rare element on Earth, remaining as a gas in the atmosphere.
Scientists in the eighteenth century recognized that there was a component of air that did not support combustion, thus discovering nitrogen.
In 1772, Daniel Rutherford discovered what he called "noxious air," air that didn't contain oxygen.
Large scale nitrogen manufacturing takes place through liquefaction of air and the fractional distillation of the resulting liquid air.
All living things contain nitrogen, mostly in amino acids, DNA, and RNA.
The human body contains about 3% nitrogen, making it the fourth most prevalent element after oxygen, carbon, and hydrogen.
Nitrogen is required to build amino acids.
Specific bacteria contain an enzyme that converts atmospheric nitrogen to a more useable form for higher life forms.
Many plants are able to synthesize nitrogen directly from the soil so that it forms proteins digestable from the plants' leaves.
The nitrogen cycle explains the movement of nitrogen from the atmosphere to the biosphere and all living organisms, and back to the atmosphere.
Nitrogen in various compound forms was already in use by the Middle Ages, while nitrogen gas was used industrially by the early twentieth century.
Several nitrogen compounds are extremely explosive, including the well-known trinitrotoluene (TNT).
Other commercial uses for nitrogen include fertilizers, cryogenics, fuel systems, production of electronics, and incandescent lightbulbs.
Nitrogren-based fertilizer run-off into bodies of water has been blamed for "dead zones" created by an overgrowth of the bacteria that then deplete oxygen from the water, killing higher organisms.
Nitrogen gas can be a health hazard in that it can displace available oxygen, causing harm without prior warning due to the body's ability to take in nitrogen.
Other harmful effects can take place in the nearly instant freezing burn from liquid nitrogen.

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