A compound with a half-filled d-orbital and an empty p-orbital in its outermost energy level is expected to exhibit moderate to high reactivity. The reactivity of a compound is influenced by its electronic configuration, as elements tend to react to achieve a stable, full outer electron shell.In this case, the half-filled d-orbital suggests that the compound has unpaired electrons, which can participate in chemical reactions. Unpaired electrons are more likely to form bonds with other atoms or ions, increasing the reactivity of the compound.The presence of an empty p-orbital in the outermost energy level also contributes to the compound's reactivity. This empty orbital can accept electrons from other atoms or ions during a chemical reaction, allowing the compound to form new bonds and achieve a more stable electronic configuration.Overall, the combination of unpaired electrons in the half-filled d-orbital and the availability of an empty p-orbital in the outermost energy level suggests that the compound is likely to be moderately to highly reactive.