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| 2. | An atom that has excess positive or negative charges caused by electron transfer. (Ion) |
| 3. | The force between two atoms that have filled their energy-level shells by sharing one or more electrons. (Covalent Bonding) |
| 4. | The quality and intensity of light reflected from a mineral. (Luster) |
| 5. | Any local concentration of mineral deposits formed by deposition from a hydrothermal solution. (Hydrothermal Mineral Deposit) |
| 6. | The geometric pattern that atoms assume in a solid. (Crystal Structure) |
| 7. | A weak electrostatic attraction that arises because certain ions and atoms are distorted from a shperical shape. (van der Waals Bonding) |
| 9. | The specific energy level of electrons as they orbit the nucleus of an atom. (Energy-Level Shells) |
| 10. | Any local concentration of minerals formed as a result of weathering. (Residual Mineral Deposit) |
| 11. | A positive ion. (Cation) |
| 13. | A form of covalent bonding between atoms in which electron sharing occurs with inner energy-level shells rather than the outermost shells. (Metallic Bonding) |
| 16. | Atoms of an element having the same atomic number but differing mass numbers. (Isotope) |
| 18. | A number stating the ratio of the weight of a substance to the weight of an equal volume of pure water. A dimensionless number numerically equal to the density. (Specific Gravity) |
| 19. | The geometric arrangement of crystal faces. (Crystal Form) |
| 21. | The proportions of the various chemical elements in a mineral. (Composition) |
| 22. | The electrostatic attraction between nagtively and positively charged ions. (Ionic Bonding) |
| 24. | A compound that occurs in more than one crystal structure. (Polymorphs) |
| 27. | An aggregate of minerals from which one or more minerals can be extracted profitably. (Ore) |
| 29. | An ion with a negative electrical charge. (Anion) |
| 30. | The smallest individual particle that retains the distinctive properties of a given chemical element. (Atom) |
