Haughton — Notes on Newtonian Chemistry — V. 291 



If mi = - 39, we find 



r' = 1-01833, a)'2 = 1-00250, w'V = 1'02088. 



This solution satisfies the conditions of the problem. 



Hydriodic Acid. — Here we have ^ = 127, and equations {a) and 



(b) become 



,2_ 127 (OTi + 127) ^ 



^ ~ 128 "" mi2+127'' 



Wi2+127 



O) = . 



Wi(9/ii+ 127) 



If vii = - 62, we find 



r' = 1-02744, la'- = 0-97093, co'V = 0-99758. 



This solution must be rejected, for w'V is less than unity. 

 If w^i = - 63, we find 



r' = 0-99632, w'- = 1-03099, oy'^r' = 1-0272. 



This solution satisfies the conditions of the problem. 



In the preceding cases we have found values for fUi that satisfy 

 the problem, but we have no right to assume that the value of nii so 

 found represents the actual value of nii ; because it only represents 

 the minimum value of nii that is possible : higher values of nii would 

 give a solution of the problem with higher stabilities to the molecules, 

 and further facts may require such higher stability. Let us now 

 bring together the facts already ascertained. 





Atomic 

 Weight. 



Periodic 

 Time. 



r 



0}'~ 



a)'2>-' 



HF 



19 



-8 



1-1768 



0-88959 



1-0469 



HCl 



35-5 



-17 



1-01281 



1-0646 



1-0782 



HBr 



80 



-39 



1-01833 



1-0025 



1-02088 



HI 



127 



-63 



0-9963 



1-0310 



1-0272 



X 2 



