P.8.5 Classifying Matter

• Describe how elements combine in a multitude of ways to produce compounds that make up all living and nonliving things.

• Describe the motion of particles in solids, liquids, and gases.

• Explain that elements are grouped in the periodic table according to similarities of their properties.

• Explain that atoms are the smallest unit of an element and are composed of subatomic particles (protons, neutrons and electrons).

• Identify common examples of acids, bases, and salts.

• Compare, contrast, and classify the properties of compounds, including acids and bases.

• Differentiate among pure substances (elements and compounds), mixtures, and solutions.