For use in regard to a helical periodic system. If the maximum positive valence exhibited by an element be numerically added to its maximum negative valence, there is evidently a tendency for the sum to equal 8. This tendency is exhibited especially by the elements of the 4th, 5th, 6th, and 7th groups and is known as Abegg's Rule. (source unknown)
See Also
13.15 - Principle of Proportion
Figure 6.17 - Areas and Volumes - Relations and Proportions
Figure 6.19 - Sphere to Cube - Relations and Proportions
Octave
Reciprocating Proportionality
Square Law
Table of the Elements