The bond formed between potassium (K) and bromine (Br) is an ionic bond. This occurs because potassium is a metal that readily loses one electron to achieve a stable electron configuration, while bromine is a non-metal that tends to gain one electron.
When potassium loses an electron, it becomes a positively charged ion (K+), and when bromine gains that electron, it becomes a negatively charged ion (Br–). The electrostatic attraction between these oppositely charged ions leads to the formation of an ionic bond.
Additionally, the difference in electronegativity between potassium and bromine is quite large. Potassium has a low electronegativity, while bromine has a high electronegativity. This further supports the nature of the bond being ionic rather than covalent.
In summary, the bond between potassium and bromine is Ionic due to the complete transfer of an electron from potassium to bromine, which creates charged ions that attract each other.