In group 15 of the periodic table or simply as Group 7A, Nitrogen is known as the lightest element i.e. “Pnictogens”. In universe it is very common and it is seventh most existing component in the solar system and Milky Way. Occurrence: Nitrogen gas is available in the environmental air by 78% volume of dry air. When two atoms of nitrogen combine they are called dinitrogen or simply as nitrogen gas. This gas is an odorless colorless gas containing two atoms. Nitrogen is found in all organisms even in the DNA and RNA i.e. nucleic acids. Our body also have approximately
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