The element with an atomic number of 17 is Chlorine (Cl). Chlorine is a member of the halogen group in the periodic table and is known for its vibrant yellow-green gas form at room temperature. It is highly reactive and is commonly used in various applications, including water purification and the production of household bleaches.
Chlorine’s atomic structure includes 17 protons and 17 electrons, making it a neutral atom. In nature, chlorine exists mainly as a diatomic molecule, Cl2, and plays a crucial role in several chemical processes, including its use in disinfecting drinking water to eliminate harmful bacteria.