Neon, for one, is a chemical element with the symbol Ne and atomic number 10. It is a noble GAS found in the Earth's atmosphere in trace amounts. Neon is a colorless, odorless, inert GAS that is used in a variety of applications, including lighting, welding, and medical imaging. It is also used in the production of rare gases, such as helium and argon. Neon is also used in the production of inert gases, such as argon and krypton.