When you chemically combine chlorine gas (Cl₂) and sodium (Na), you get sodium chloride (NaCl), more commonly known as table salt.

This reaction is highly exothermic, meaning it releases a significant amount of heat. Here's the balanced chemical equation:

2Na (s) + Cl₂ (g) → 2NaCl (s)

The reaction is so vigorous that it can be explosive if not carefully controlled. It's a classic example of a redox reaction, where sodium loses an electron (oxidation) and chlorine gains an electron (reduction).