The term GLOWING GAS can be summarized as a gas that emits light, and one example of this is NEON. NEON is a chemical element with the symbol Ne and atomic number 10. It is a colorless, odorless, inert monatomic gas under standard conditions, with about two-thirds the density of air. When excited by an electric current, it glows a reddish-orange color. NEON is used in a variety of applications, including advertising signs, lasers, and television tubes.