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15.5.11

Abegg’s rul



Abegg’s rule:  An empirical rule, holding for a large number of elements, that 
     the sum of the maximum positive and negative valencies of an element equals eight. 

abalyn


abalyn : A liquid rosin  that is a methyl ester of abietic acid;  prepared by 
     treating rosin with methyl alcohol; used as a plasticizer.