Abegg's rule

noun
\ ˈä-ˌbegz- , -ˌbeks- \

Medical Definition of Abegg's rule 

: a rule in chemistry: for a given chemical element (as sulfur) the sum of the absolute value of its negative valence of maximum absolute value (as −2 for sulfur in H2S) and its positive valence of maximum value (as +6 for sulfur in H2SO4) is often equal to 8

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