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Nitrogen occurs in all organisms, primarily in amino acids (and thus proteins), in the nucleic acids (DNA and RNA) and in the energy transfer molecule adenosine triphosphate. The human body contains about 3% by mass of nitrogen, the fourth most abundant element in the body after oxygen, carbon, and hydrogen.
Amines are organic compounds (hydrocarbons) which contain the element nitrogen. Everyone knows ammonia a compound of nitrogen and hydrogen with the formula NH3. Draw the structure of ammonia and determine the number of bonding pairs of electrons and the number of lone-pair electrons.