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Chem 105 Test #3
Chapters 7&8
| Question | Answer |
|---|---|
| What is Isoelectronic? | When 2 ions and/or elements have the same electronic configuration |
| Octet Rule | 8e- in the outer shell of an atom; most stable state of an atom |
| Cations | (+) charged ions; smaller than the parent element because loses e- shell |
| Anions | (-) charged ions; larger in size than the parent atom because protons in the nucleus cannot hold the extra electrons closely |
| Ionization Potential | (kJ/mol) Amount of energy required to remove one e- from an atom - (+) values - usually endothermic - the lower the IP, the more reactive |
| Electron Affinity | Energy associated when an atom gains an e- usually (-) values - Exothermic |
| Frequency | # of waves that pass a point per second (Hz) |
| Wavelength | nm - 1nm=3*10^-9m |
| Plank's Constant | h= 6.626*10^-34 J*s |
| Speed of Light | c= 3*10^8 m/s |