Atomic States and Term Symbols of Free Ions

The deviation from the Curie law can be treated as a perturbation to Eq. 8.7 by replacing Twith a (T — 9) term, yielding the Curie-Weiss law  

2 ATOMIC STATES AND TERM SYMBOLS OF FREE IONS 

Each electron in an atom can be specified by a unique set of four quantum numbers. These are  

The principal quantum number, n(n = 0, 1, 2, 3. oo). This quanmm number represents the relative overall energy of the orbital. 

This quantum number gives the projection of / along a specified axis. For a given I, there ate (21 + 1) possible values for m . By convention, z is chosen as the unique axis. 

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