Is water wet? me and my friend are having a debate

The number at the end of an isotope’s name is the number.

In salt water solution,the salt is the blank

The chemical equation below shows the reaction of sodium (na) and chlorine (cl) to form sodium chloride (nacl). 2na + cl2 → 2nacl in this equation, which of the following is a reactant? i. sodium ii. chlorine iii. sodium chloride