A ____ is a non solid state of matter in which the atoms and molecules are free to move past each other, as in a gas or liquid.

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The answer is GAS. In a gas, the particles are in a completely random motion in any direction. And it is not solid. Hope I helped. Good luck
A GAS is a non solid state of matter in which the atoms and molecules are free to move past each other, as in a gas or liquid.