chem shat vocab 2
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Created by:
sweetiepie5xox on September 30, 2010
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10 terms
Terms | Definitions |
|---|---|
 Hund's rule | one electron per orbital of equivalent energy before doubling up |
| Aufbau Principle | orbitals of lowest energy fill with electrons first |
| Paulis exclusion principle | no two electrons in an atom can have the same set of quantum numbers |
| orbital | area occupied by electrons within an energy level |
| valence electron | electrons occupying the outer energy level and electrons in unfilled "d" orbitals |
| electromagnetic radiation | a form of energy that exhibits wavelike behavior as it travels through space |
| photon | a particle of electromagnetic radiation |
| mass number | total number of protons and neutrons |
| atomic number | number of protons H plus |
| isotope | atoms of the same element with different number of neutrons and therefore different mass numbers |
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