Interested in advertising on Derpibooru? Click here for information!
Derpibooru costs over $25 a day to operate - help support us financially!
Third noble gas. Argon represents only 1% of the atmosphere. Very stable, it is used in lightbulbs to prevent the oxydation on the electrical filament. Its light emits a purple color. Twilight enjoys doing experiments with this gas as the light sparkles in her coat color.