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Unformatted text preview: antum numbers n, l, ml , and ms.
Consequences of the Pauli Exclusion Principle:
• For a given orbital the values of n, l, ml are fixed. Thus, if we
put more than one e- in a single orbital they must have different
spin • Because there are only two ms values, then an orbital can hold a
maximum of two electrons, and they must have opposite spins. 3 05-Sep-13 Notation
Orbital diagrams: each orbital is represented by a box (or line) and
each electron by a half arrow. A half arrow pointing up (↑) represents
ms = +1/2 while a half arrow pointing down (↓) represents ms = -1/2.
The nlx notation: Each subshell is represented by the value of n, the
letter representation of l (s, p, d, or f ) and the superscript ‘x’, which
corresponds to number of e- in the subshell. The subshells are written
in order of increasing energy and the number of electrons in each
subshell is indicated by a superscript.
nlx notation: electrons
# of _______________ in subshell 2p6
Principal quantum number, n
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