Nitrogen is a chemical element with symbol N and atomic number 7. It belongs to the group 15 elements in the periodic table and is known for its diatomic molecular form (N₂) which makes up about 78% of Earth's atmosphere.
Related terms
Atomic number: The number of protons in an atom's nucleus, uniquely identifying each element.
Diatomic molecule: A molecule composed of two atoms bonded together, such as N₂ or O₂.
Periodic table: A tabular arrangement of chemical elements based on their atomic numbers and recurring chemical properties.