* Ionic Compounds: Sodium (Na) is a metal and chlorine (Cl) is a nonmetal. When they combine, they form an ionic compound. Ionic compounds are usually solids at room temperature.
* Formula Structure: The correct formula for the compound formed between sodium and chlorine is NaCl (sodium chloride). This formula indicates that one sodium atom combines with one chlorine atom.
Therefore, there is no substance with the formula "Cl2Na2" that exists as a solid, liquid, or gas.