In valence theory, the 8 electrons of the 2nd and 3rd shell are each distributed in one octant of the Cartesian coordinate system:

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Compared to the 4 quantum numbers of QM, the number of valence numbers in valence theory simplifies to two: octant triplet and the orientation of magnetic dipoles:

+1,+1,+1 /+1 +1,+1,-1 /-1 +1,-1,-1 /+1 +1,-1,+1 /-1 -1,+1,+1 /-1 -1,+1,-1 /+1 -1,-1,-1 /-1 -1,-1,+1 /+1

Convention: X,Y,Z / Dipole orientation (allowed values 1; -1)

<aside> 📌 Presumtion: For the description of the electron in the 2nd and 3rd shell, the octant position and the orientation of the magnetic dipole are sufficient. ↓23↓

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TL;DR Symmetry of the Magnetic Valence Number