Question

what happens to particles in matter when thermal energy is absorbed? the average speed of the particles increases. the particles get larger. strong attractions are formed between particles. the particles move closer together. 16 respuestas múltiples 1 punto select all of the particle diagrams below that represent a pure substance.

Explanation:

When thermal energy is absorbed by matter, the kinetic energy of its particles increases, causing the average speed of the particles to rise. A pure substance has only one type of particle or one type of molecule. The upper - diagram shows a single type of molecule (a compound), which is a pure substance. The lower - diagram shows a mixture of two different types of atoms, so it is not a pure substance.

Answer:

1. The average speed of the particles increases.
2. The upper particle diagram (with blue - white molecule pairs) represents a pure substance.