It is an odorless, colorless, and mostly inert gas, and continues to be colorless and odorless at a liquid state. -Nitrogen is believed to be the seventh most abundant element in the universe. -At normal pressure, nitrogen liquefies 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.
