# What is the letter "C" for the element carbon?

• ${\text{CH}}_{4}$ conveys the structure of methane, without having to explain what "methane" means.
• $\text{CH"_3"CH"_2"OH}$ conveys the structure of this two-carbon alcohol, instead of requiring one to explain what "ethanol" means.
Similarly, $\text{Ag}$, or argentum from the latin, denotes the element silver, for convenience of conveying structural details.