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Nitrogen is a pure substance of gas that we breathe in every of our daily life . It is colorless so we could not notice it in the air . I t is not dangerous for our body , but if it is nitrogen oxide this gas can damage or kill our breathing. Nitrogen has the chemical symbol N. The element of it is thirty three element in the abundance in the earth’s crust. Moreover, the nitrogen ‘s atom has seven protons and seven electrons in and around the nucleus , they are positively charge and negatively charge The atomic number of it is number 7.Nitrogen has 2 shells the inner shell which contains two and the outer shell contains five .This is because normally the nitrogen’s atom outer can be able to hold only eight electrons since the atoms could be bond or join together with the others three electrons. Thus, Nitrogen is the most abundant element in Earth’s atmosphere.
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