Question

9 multiple choice 1 point which phase of matter has the strongest attractions among particles? liquids gases solids 10 multiple choice 1 point what happens at the particle level when temperature increases? the particles move faster. the particles get larger. the particles spread apart. the particles have more frequent or forceful collisions. 11 numeric 1 point how many significant figures are in 5000 mg? answer

Explanation:

Step1: Recall particle - phase relationships

In solids, particles are closely packed together due to strong intermolecular forces. In liquids, particles are closer than in gases but have weaker attractions compared to solids. Gases have very weak intermolecular attractions and particles are far apart. So, solids have the strongest attractions among particles.

Step2: Recall effect of temperature on particles

According to the kinetic - molecular theory, as temperature increases, the kinetic energy of particles increases. This leads to faster - moving particles, more frequent collisions, and more forceful collisions. Particles do not get larger as temperature increases. While particles may spread apart in some cases (e.g., thermal expansion), the most fundamental change at the particle level is that they move faster and have more frequent/forceful collisions.

Step3: Determine significant figures

For a number like 5000, if no decimal point is present, the trailing zeros are not significant. So, 5000 has 1 significant figure.

Answer:

1. C. Solids
2. D. The particles have more frequent or forceful collisions.
3. 1