The Valence of Chlorine 263 



their compounds cannot be definitely determined from their 

 cohesion on account of the inadequacy of the critical data. 



4. The cohesional method detects two kinds of valences, 

 namely, valences actually extending between the atoms 

 and active in binding the atoms together; and valences active 

 or open, which are in a position to unite, but to which no 

 atoms are attached. Reserved, or resting, valences play no 

 part as valences in molecular cohesion. 



University of Chicago 



