Where is nitrogen found or obtained from?
== == Nitrogen is found in all living systems as part of the makeup of biological compounds. Nitrogen is obtained from the atmosphere by passing air over heated copper or iron. The oxygen is removed from the air, leaving nitrogen mixed with inert gases. Pure nitrogen is obtained by fractional distillation of liquid air; because liquid nitrogen has a lower boiling point than liquid oxygen, the nitrogen distills off first and can be collected.
Elemental Nitrogen may be conveniently obtained by cryogenic distillation from the atmosphere. The liquid form is widely used as a low temperature coolant. It is an important part of our diet, and is found in proteins. Nitrates are very useful chemicals, and until recently, were obtained from immense deposits of seabird droppings, sometimes called guano.
The existence of Argon was suspected by Henry Cavendish but it was not until more than a hundred years later that it was isolated. Lord Rayleigh and Sir William Ramsay conducted an experiment in which they removed all the oxygen, carbon dioxide, water and nitrogen from a sample of clean air. They found that nitrogen obtained in this manner was 0.5% heavier than that obtained from other compounds. They concluded that that there was some…