Sunday, May 15, 2011

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.