Final answer:
Lithium donates its one valence electron to bromine, forming Li+ and Br- ions, which attract each other and create the bond. The resulting compound, lithium bromide (LiBr), has a crystalline lattice structure.
Step-by-step explanation:
An ionic bond occurs when one atom transfers electrons to another atom, resulting in the formation of positive and negative ions. In this case, lithium donates its one valence electron to bromine, forming Li+ and Br- ions. The opposite charges attract each other, creating an ionic bond. This type of bond is shown in many ionic compounds, where metal atoms donate electrons to nonmetal atoms. The resulting compound, lithium bromide (LiBr), is a solid with a regular repeating structure called a crystalline lattice.