Final answer:
The highest energy state of matter is gas, while the lowest energy state is solid.
Step-by-step explanation:
The highest and lowest energy states of matter can be found in the gas and solid phases, respectively. In a gas, the particles have high kinetic energy and are not bound closely together, allowing them to move freely. This results in a high energy state. On the other hand, in a solid, the particles are tightly packed and have very low kinetic energy, leading to a low energy state.
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