How can you defined work done in term of kinetic energy, potential energy, and the force?

The principle of work and kinetic energy (also known as the work-energy theorem) states that the work done by the sum of all forces acting on a particle equals the change in the kinetic energy of the particle. ... This relationship is generalized in the work-energy theorem.

An atom's smaller negative particles are at a distance from the central positive particles, so the negative particles are easier to move.