| A | B |
|---|
| An arrangement of ions bonded in a repeating three-dimensional pattern | CRYSTAL LATTICE |
| A positive particle in the nucleus that attracts electrons | PROTON |
| A unifying explanation for a broad range of hypotheses observations that have been supported by testing | THEORY |
| An interaction that holds two atoms together | CHEMICAL BOND |
| An electron in the outermost energy level of an atom | VALENCE ELECTRON |
| A bond that forms when electrons are transferred from one atom to another atom | IONIC BOND |
| A chart that displays all elements by atomic number and can be used to determine the number of valence electrons for some elements | PERIODIC TABLE |
| A substance composed of molecules consisting of two atoms of the same element or only two atoms of different elements. Example: H2 or CO | DIATOMIC MOLECULE |
| The joining of atoms to form new substances | CHEMICAL BONDING |
| A bond formed when atoms share one or more pairs of electrons | COVALENT BOND |
| A substance that contains covalent bonds consisting of individual particles. Covalent bonds are composed of nonmetals only. | MOLECULE |
| The attraction between positively charged metal ions and the electrons in a metal | METALLIC BOND |
| A charged particle that forms when one or more valence electrons are transferred from one atom to another | ION |
| A compound formed from metal and nonmetal ions. | FORMULA UNIT |
