What is the atomic number of N?

Hint :N symbol is for nitrogen. It belongs to $ {15^{th}} $ group and $ {7^{th}} $ period. It has an atomic number $ 7 $ . Nitrogen is considered the lightest element of its group. It is usually present in a gaseous state. It is one of the most essential elements for living organisms.

Complete Step By Step Answer:
N is the symbol for the element nitrogen. The atomic number of nitrogen is $ 7 $ . Its atomic weight is $ 14.007 $ g per mol. It was first discovered and isolated by Scottish physician Daniel Rutherford. It is a p-block element. Nitrogen belongs to the $ {7^{th}} $ period and $ {15^{th}} $ group of the periodic table. It is usually present in gas form. Nitrogen is the lightest member of group $ 15 $ , often called the pnictogens. Nitrogen is said to be the $ {7^{th}} $ most abundant element in the universe. At standard temperature and pressure, two atoms of the element bind to form dinitrogen $ \left( {{N_2}} \right) $ , which is a colorless and odorless diatomic gas. It has five electrons in its outer shell, so it is trivalent in most compounds.
Nitrogen is mainly present in the air. It constitutes $ 78{\text{ }}\% $ of earth’s atmosphere. It is a constituent of all living matter.
Nitrogen is essential to life on Earth. It is a component of all proteins, and it can be found in all living systems. Nitrogen compounds are present in organic materials, foods, fertilizers, explosives, and poisons. Nitrogen is crucial to life, but in excess, it can also be harmful to the environment. One of the most important nitrogen compounds is ammonia $ \left( {N{H_3}} \right) $ , which can be produced in the so-called Haber-Bosch process, in which nitrogen is reacted with hydrogen.

Note :
Nitrogen is essential to humans but it can also become harmful. Inhalation of excessive amounts of nitrogen can cause dizziness, nausea, vomiting, loss of consciousness, and death. Liquid nitrogen has a boiling temperature of $ - 196^\circ C $ at atmospheric pressure. Direct contact can freeze the skin causing frostbite and cold burns.