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Nitrogen is a chemical element with the symbol N and atomic number 7. It is a nonmetal that is found in the Earth's atmosphere and is a component of many molecules, including amino acids, proteins, and DNA.
In its atomic structure, nitrogen has 7 protons in its nucleus, which give it an atomic number of 7 and make it an element. The number of neutrons in the nucleus of an atom of a particular element can vary, but the most stable isotope of nitrogen has 7 neutrons in its nucleus. This means that nitrogen has a total of 14 neutrons in its nucleus, with 7 protons and 7 neutrons.
The number of protons and neutrons in an atom's nucleus determines the atomic mass of the element. The atomic mass of nitrogen is 14.00674, which is the average mass of naturally occurring nitrogen atoms. This value is based on the fact that the most stable isotope of nitrogen (with 7 protons and 7 neutrons) is the most abundant isotope of nitrogen in the natural world.
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