The normal phase of nitrogen is the gas phase, which means that nitrogen is found naturally in the atmosphere as a gaseous compound. The element has a chemical symbol of N and an atomic number of seven.
At room temperature, nitrogen is found in a diatomic state. It is both colorless and odorless. It makes up approximately 78 percent of the Earth's atmosphere. The element has an atomic mass of 14 atomic mass units, which means that it has seven protons, seven neutrons and seven electrons. The element is also classified as a non-metal and is found in group 15 and period two.