3.3a All matter is made up of atoms. Atoms are far too small to see with a light


3.3b Atoms and molecules are perpetually in motion. The greater the temperature, the

greater the motion.

3.3c Atoms may join together in well-defined molecules or may be arranged in regular

geometric patterns.

3.3d Interactions among atoms and/or molecules result in chemical reactions.

3.3e The atoms of any one element are different from the atoms of other elements.

3.3f There are more than 100 elements. Elements combine in a multitude of ways to

produce compounds that account for all living and nonliving substances. Few elements

are found in their pure form.

3.3g The periodic table is one useful model for classifying elements. The periodic table

can be used to predict properties of elements (metals, nonmetals, noble gases).