* Sodium (Na)

* Chlorine (Cl)

The chemical formula for rock salt is NaCl, which is also known as sodium chloride.

It's important to note that:

* Rock salt is the natural form of sodium chloride, usually found in large underground deposits.

* Table salt is refined sodium chloride, which is often fortified with iodine.

Both rock salt and table salt are chemically the same, but they have different physical characteristics and uses.