2Na Cl2 represents two elements (sodium and chlorine) and one compound (sodium chloride).

Here's why:

* Elements: Sodium (Na) and chlorine (Cl) are elements, which are the basic building blocks of matter.

* Compound: Sodium chloride (NaCl) is a compound formed by the chemical combination of sodium and chlorine in a fixed ratio (1:1).

The coefficient "2" in front of NaCl indicates that there are two units of sodium chloride. It doesn't change the fact that NaCl is a compound.