Answer:
Energy is a fundamental concept in understanding the behavior and motion of particles in solids, liquids, and gases.
In solids, the particles are tightly packed together and possess a relatively low amount of energy. The particles vibrate in their fixed positions, transferring kinetic energy through collisions with neighboring particles. The stronger the intermolecular forces between the particles, the more tightly packed they are and the more difficulty they have in moving.
In liquids, the particles are more loosely packed than solids, and possess more kinetic energy. They are free to move and slide past one another, allowing liquids to change shape and flow to fill their containers. In liquids, the energy is mainly potential energy related to the attractive intermolecular forces between particles.
In gases, the particles are the most loosely packed with the highest amount of energy. They move at high speeds in all directions and collide frequently with each other and the walls of their container. The energy in gases is mostly related to the kinetic energy of the particles, due to their high speeds and lack of intermolecular forces.
In summary, the energy of the particles in solids, liquids, and gases is responsible for their behavior and motion. In solids, particles vibrate in place with low energy, in liquids, particles slide past one another with moderate energy, and in gases, particles move at high speeds with the most energy.