Question

Elaborate on the reason(s) that matter is said to move even as in a solid state. A) The particles are bound through intermolecular forces but are able to move past each other with relative freedom. B) The particles have sufficient energy to become an ionized gas and are in the most common state of matter in the universe. C) The particles are not able to move out of their positions relative to one another, but do have small vibrational movements. D) The particles are not bound to one another, move quickly, have a low density, and are able to spread apart from one another if unconstrained.

Answer 1

Answer: Option (C) is the correct answer.

Explanation:

• In a solid substance, molecules are held together by strong intermolecular forces of attraction. As a result, they are unable to move from their initial place but they can vibrate at their mean position.  

Hence, in solid substances the molecules have low kinetic energy.

• Whereas in a liquid substance, the molecules are held by less strong intermolecular forces of attraction as compared to solids. Due to which they are able to slide past each other. Hence, they have medium kinetic energy.

• In a gaseous substance, the molecules are held by weak Vander waal forces. Hence, they have high kinetic energy due to which they move rapidly from one place to another leading to more number of collisions.  

Hence, gases are able to expand more rapidly as compared to liquids.

Thus, we can conclude that particles are not able to move out of their positions relative to one another, but do have small vibrational movements is the reason that matter is said to move even as in a solid state.

Answer 2

I believe the correct response would be C.