The symbol of an inert gas which is used mostly in signboards?

Neon is used mostly in sign boards and it is represented by the symbol Ne.
The elements in group 18 are all gases. Their outermost shell is completely filled which is why they are highly stable and don’t react with other elements easily. So, they are called inert gases or noble gases. Neon is an inert gas which is mostly used in advertisements. It lights up glass tubes in advertising displays. It is also used in neon signs.