NSCI 1321 Lecture 17: Chapter 8 Electron Configuration
26 Dec 2016
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Document Summary
First observed in 1921, by otto stern and walther gerlach. The two possible spin orientations of an electron and the conventions for ms. An electron configuration of an atom is a particular distribution of electrons among available subshells. Electron configuration of boron, b (z = 5) An orbital diagram of an atom shows how the orbitals of a subshell are occupied by electrons. Orbitals are represented with a circle; electrons are represented with arrows up for ms= + or down for ms= - . The pauli exclusion principle summarizes experimental observations that no two electrons in one atom can have the same four quantum numbers. That means that within one orbital, electrons must have opposite spin. It also means that one orbital can hold a maximum of two electrons (with opposite spin). An s subshell, with one orbital, can hold a maximum of 2 electrons. A p subshell, with three orbitals, can hold a maximum of 6 electrons.
