The formula for sodium halides is NaX, where X represents any halogen element:

* Fluorine (F): NaF (Sodium Fluoride)

* Chlorine (Cl): NaCl (Sodium Chloride)

* Bromine (Br): NaBr (Sodium Bromide)

* Iodine (I): NaI (Sodium Iodide)

* Astatine (At): NaAt (Sodium Astatine)

Sodium halides are ionic compounds formed by the reaction of sodium metal with halogens. They are typically white crystalline solids that are soluble in water.