You're asking about the ratio of atoms in a compound. Let's break down how to figure that out:

* The compound: You need to specify the compound you're interested in. The most common compound of sodium and chlorine is sodium chloride, also known as table salt (NaCl).

* Chemical Formula: The chemical formula NaCl tells us that for every one sodium atom (Na), there's one chlorine atom (Cl).

Therefore, the ratio of sodium atoms to chlorine atoms in sodium chloride is 1:1.