When the metallic element sodium combines with the nonmetallic element bromine, br2 (l), what is the chemical formula of the product?

The element Sodium will form a + 1 cation, while the bromine a - 1 anion. Since the anion bromine is always a liquid, therefore its symbol is Br2 (l). So, the chemical equation for their reaction is:

2Na (s) + Br2 (l) - > 2NaBr (aq)