Based on the visual representations above, define ALL three of the following words. A. Attraction B. Repulsion C. Rotation

Compare and contrast physical changes with chemical changes.

Which sentence about particles in matter is true? a. atoms are present in solids and liquids but not in gases. b. the particles of matter are in constant motion. c. the same kinds of atoms are found in different elements. d. when a solid changes to a liquid, the sizes of the particles change.

Describe the forces both attractive and repulsive that occur as two atoms move closer together.