Scalar quantity: A scalar quantity is a physical quantity that has magnitude but no direction. In the case of ∆Ue, it only tells us about the amount of change in electric potential energy without specifying its direction.
Electric potential: Electric potential is a scalar quantity that measures the amount of electric potential energy per unit charge at a given point in an electric field.
Electric field: An electric field is a region around charged particles or objects where other charged particles experience forces. It determines how charges interact with each other and affects their electric potentials and energies.