Chem vocab
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Created by:
catsmustdie on November 15, 2009
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14 terms
Terms | Definitions |
|---|---|
 quantum number | a number describing a property of an electron in an atom |
| heisnberg uncertainty principle | can't know both energy and position of an electron at the same |
| aufbau principle | order of filling according to energy level |
| wave particle duality theory | all particles have wave properties and all waves have particle properties |
| pauli exclusion principle | no to electrons can have the same four quantum numbers |
| valance electrons | the number of electrons in the outermost energy level |
| isotopes | atoms of the same element that have a different number of neutrons |
| protons | particle with a positive charge found in nucleaus |
| neutrons | particle with no or neutral charge found in nucleaus |
| electrons | a negativly charged particle flosting outside the nucleaus |
| lewis dots | representation of an atom in which an element symbol stands for the nucleus and all the inner level electrons while dots stand for outer level electrons |
| exceptions to the aufbau principle | d4 and d9 |
| hund's rule | in orbitals of equal energy (p, d, f) place one elevtron in each orbital vefore making any pairs. all single electrons must spin the same was |
| rule of eight | eight is stable valance electrons |
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