Answer: Neon
Explanation:
Neon is a chemical element with atomic number 10 and symbol Ne. It is a odorless and colorless monoatomic inert gas.
This Neon can be used in vacuum, high voltage indicators, and helium neon lasers.
It forms yellow -orange light around 600 nanometer. It is inert gas and does not takes part in any chemical reaction because it has valence electrons in its outermost shell.