Question

which of these settles into layers? element suspension colloid solution multiple choice 1 point which phase of matter has the strongest attractions among particles? gases liquids solids multiple choice 1 point which of these is a pure substance? heterogeneous mixture homogeneous mixture solution compound

Explanation:

1. Suspensions are mixtures where particles are large enough to settle out into layers over time due to gravity. Elements are pure substances and do not settle into layers. Colloids have particles that remain dispersed and do not settle out easily. Solutions are homogeneous mixtures at the molecular - ion level and do not settle.
2. Solids have the strongest particle - particle attractions. In solids, particles are closely packed and have strong intermolecular forces holding them in place. Liquids have weaker attractions than solids, and gases have the weakest as their particles are far apart and move freely.
3. A compound is a pure substance made up of two or more different elements chemically combined in a fixed ratio. Heterogeneous mixtures have non - uniform composition, homogeneous mixtures and solutions are mixtures (not pure substances) with uniform composition at the macroscopic level.

Answer:

1. B. suspension
2. C. Solids
3. D. Compound