electron config.

electron config. - Josh Huver Huver - 1 Mr. Billings Honors...

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Josh Huver Huver - 1 Mr. Billings Honors Chemistry 17 January, 2006 Electron Configurations The Aufbau Principle is a set of rules for the placement of electrons in the atomic orbital of an atom. These rules state: 1) Electrons are placed in the lowest energetically available subshell. 2) An orbital can hold at most 2 electrons spinning in opposite directions. 3) If two or more energetically equivalent orbital are available (as in the s, p, or d levels), then the electrons should spread out before they are paired up. The number of electrons that can occupy each orbital is limited by the Pauli exclusion principle, which states an atomic orbital may desire at most two electrons. If multiple orbitals of the same energy are available, Hund's rule says that unoccupied orbitals will be filled before occupied orbitals are reused (by electrons having different spins). So, according to the Aufbau principle, if you were to show the electron configuration for Sulfur Atomic Number 16, the orbital would look like:
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electron config. - Josh Huver Huver - 1 Mr. Billings Honors...

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