00-6
Chapter One
Atoms
You'll Need to Know
* what is the Aufbau Principle
* how to determine noble gas core abbreviation
* what is the Bohr model
* what are quantum numbers
* diamagnetism vs. paramagnetism
* important people, experiments, and theories
* energy and other relationships (amplitude, frequency, momentum, photoelectric effect, Planck's constant,
Rydberg constant, velocity, wavelength, etc.)
The Aufbau Principle
Electrons are added to atoms in order of increasing energy:
1[s.sup.2]2[s.sup.2]2[p.sup.6]3[s.sup.2]
3[p.sup.6]4[s.sup.2]3[d.sup.10]4[p.sup.6]
5[s.sup.2]4[d.sup.10]5[p.sup.6]6[s.sup.2]
4[f.sup.14]5[d.sup.10]6[p.sup.6]7[s.sup.2]
5[f.sup.14].
Noble Gas Core Abbreviation
Select the noble gas that most nearly precedes the element being considered. Place its symbol in square brackets, and
continue from that point with the electron configuration. Example: Sr would be [Kr]5[s.sup.2].
For neutral atoms, the number of ... read full excerpt from CliffsAP Chemistry ebook
