gas
solid
Gas.
Gases
The physical state, or phase, that has the greatest kinetic energy is gas. In a gas, the molecules are more free to move and they move more rapidly than in the other phases, and it is this motion that constitutes kinetic energy.
When any substance goes from solid to liquid to gas, the kinetic energy of the molecules increases.Molecules in the gaseous state have the most kinetic energy.Molecules in the solid state have the least kinetic energy.
Gaseous State
The four stages of matter in order from least kinetic energy to most kinetic energy are solid, liquid, gas, and plasma. In a solid, particles have the least kinetic energy and are tightly packed together. In a plasma, particles have the most kinetic energy and are ionized.
what do you
The state of matter than has the least internal kinetic energy (the kinetic energy of all the internal particles relative to the center of mass of the system), or the least internal + macrosopic kinetic energy, is the same state as "Which state of matter has the least thermal energy?". (hint: it's not the gaseous state). However, if you are asking what state of matter has the least macroscopic kinetic energy: Every state of matter can have systems with zero macroscopic kinetic energy. So none of them (or perhaps all of them) have the "least" kinetic energy.
In the solid state, particles are tightly packed and have the least amount of kinetic energy. In the liquid state, particles are less tightly packed and have more kinetic energy than in the solid state. In the gas state, particles are far apart and have the most kinetic energy.
Molecule movement is greatest in the gaseous state of matter, where molecules have the most kinetic energy and are able to move freely and rapidly.
I believe that gases have the most kinetic energy of all states of matter. This is because the molecules are moving around very quickly in a random, disordered motion. This can get extremely technical in terms of thermodynamics, but there should be books available to explain this further in a simplified manner.