In potassium bromide (KBr), the ions present are potassium ions (K+) and bromide ions (Br-).
Potassium bromide is an ionic compound formed by the transfer of one electron from a potassium atom (which loses an electron) to a bromine atom (which gains an electron). This transfer of electrons results in the formation of positively charged potassium ions (K+) and negatively charged bromide ions (Br-). The resulting electrostatic attraction between these ions holds the compound together in a crystal lattice structure.