| Term | Definition |
|---|
| Valence Electrons | an electron in the highest occupied energy level of an atom |
| Electron Dot Structures | a notation that depicts valence electrons as dots around the atomic symbol of the element; the symbol represents the inner electrons and atomic nucleus; also called Lewis dot structures |
| Octet Rule | atoms react by gaining or losing electrons so as to acquire the stable electron structure of a noble gas, usually eight valence electrons |
| Halide Ion | a negative ion formed when a halogen atom gains an electron |
| Ionic Bonds | the electrostatic attraction that binds oppositely charged ions together |
| Coordination Number | the number of ions of opposite charge that surround each ion in a crystal |
| Metallic Bonds | the force of attraction that holds metals together; it consists of the attraction of the free-floating valence electrons for positively charged metal ions |
| Ionic Compound | Compounds that consist of electrically neutral groups of ions joined by electrostatic forces |
| Substitutional Alloy | If the atoms of the components in an alloy are about the same, they can replace each other in the crystal |
| Interstitial Alloy | If the atmoic sizes are quite different, the smaller atoms can fit in the interstices between the larger atoms |
| Alloy | mixtures composed of 2 or more elements, at least one of which is metal |
| Body-Centered Cubic | every atom has 8 neighbors; includes Na, K, Te, Cr, Tu |
| Face-Centered Cubic | Every atom has 12 neighbors; includes Cu, Au, Ag, Al, Pb |
| Hexagonal Close-Packed | Every atom has 12 neighbors; includes Mg, Zn, Cd |
| X-ray Diffraction Crystallography | Determines internal structures of crystals |
| Covalent Bonds | The sharing of a pair of valence electrons by two atoms |
| Polar Covalent | The sharing of the electron pair is unequal |
| Cation | Atoms loss of valence electrons; 1-3 valence electrons; + |
| Anion | Gain of negatively charged electron; - |
Combine with other sets
Share on Facebook
Share on MySpace
!