| A | B |
|---|
| Alloy | A mixture of two or more elements, at least one metal, that retains the property of a metal. |
| Anion | An ion with a negative charge. |
| Cation | An ion with a positive charge. |
| Compound | A substance that is made from two or more simpler substances and can be broken down into simpler substances. |
| Covalent Bond | A chemical bond in which two atoms share electrons. |
| Diatomic Element | Molecules made of only two atoms. |
| Electron Affinity | Energy absorbed when an electron is added to an atom. |
| Ion | An atom that has a positive or negative charge. |
| Ionic Bond | The force that holds cations (metals) and anions (nonmetals) together. |
| Ionization Energy | Energy required to remove an electron. |
| Metallic Bond | The attraction between a metal cation and the shared electrons that surround it. |
| Molecule | A neutral group of atoms that are joined together by one or more covalent bonds. |
| Octet Rule | Eight electrons in the outermost (highest) energy level is considered stable for most atoms. |
| Polar Covalent Bond | A bond in which electrons are not shared equally. |
| Polyatomic Ion | A bonded group of atoms that has a positive or negative charge and acts as a single unit. |
| Valence Electrons | Electron(s) that are in the highest (or outermost) energy level of an atom. |
