Question

describing the states of matter (pages 68–70)
choose two phrases that describe how particles at the atomic level are arranged within most solids.

☐ randomly arranged

☐ packed close together

☐ arranged in a regular pattern

Explanation:

To determine the correct phrases, we recall the properties of particles in solids. In most solids, particles are closely packed (due to strong intermolecular forces) and arranged in a regular, repeating pattern (characteristic of crystalline solids, which most solids are). "Randomly arranged" describes liquids or gases, not most solids.

Answer:

B. packed close together, C. arranged in a regular pattern