Electrons in Atoms

By: Paul Treible Pg. 6

Electron Configuration

Electron configuration is a numeric representation of its electron orbitals. Electrons fill the energy levels by lowest to highest order. Writing the electron configuration is writing the layout of the energy levels and the electrons on them. An orbital can only hold 2 electrons on it .The first sub level is S and it has only 1 orbital. The second sub level is P which has 3 orbitals. The third sub level is D and has 5 orbitals. The forth and final sub level is F and has 7 orbitals. An example on how to write electron configuration is:


Oxygen: O= 1s22s22p4

Orbital Notation

Orbital Notation is a way to show the electron layouts in A visual format. Orbital notation is used to show the electron layout of the orbitals of each energy level. It also shows how Hund's "school bus" rule actually works. Hund's rule states that electrons feel up the empty orbitals first and then start pairing up. To Write orbital notation, you have to make the orbitals for each energy level. Depending on the amount of electrons you put one into each orbital of the energy level at a time and you place them in the order from left to right. A couple of examples would be right below this paragraph.
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