the Hydrogen Molecule. 1035- 



does, however, depend upon the rotation of charges upon 

 their own axes, the /3-terms. 



Table I. 



P=3-78x 10- 3 5, z 2 = -4. 



x- force... 

 z- force... 



r. r~ 2 Xl0 20 . r- 6 Xl0 20 . r" 8 Xl0 20 . 

 term. term. term. 

 •79x10-3 1067 16-41 - 7*677 

 •81xl0- 8 0-922 11-075 17"39 



r -10 xl0 2 . 



term. 



- 9-595 



29-26 



P=2x 3-78x10-35, Z 2 =-4. 



#-force... 

 z -force... 



•56 Xl0- 8 2-124 501 -233-1 

 •57X10- 8 0-186 365 578'6 



-289-9 

 -983 



This is rather a startling proposition, for it is well-known 

 that no system of point charges alone without motion postu- 

 lated can be so arranged as to produce a stable configuration 

 for small displacements. 



The Energy of Dissociation. 



In the example of the two hydrogen atoms the forces have 

 been given for the action of the second atom upon the first 

 only, the individual parts not being expressed. The force, 

 however, of the second atom upon the positive charge of the 

 first is equal and opposite to the sum of the forces upon the 

 two electrons at the position of equilibrium. These forces 

 are each very great compared with their difference, which 

 represents the whole force upon the atom. This may be 

 proved by an examination of the equations above given, from 

 which it will appear that the coefficient of the r~ 6 term is 

 not small. 



The effect of these forces is to increase the pressure 

 between the positive charge, or nucleus, and one electron, 

 and at the same time decrease the pressure between the 

 nucleus and the other electron. The result must be to 

 deform the shape of the four electrons very slightly, flattening 

 one pair and increasing the minor axis of the other pair in 

 the molecule. 



The area of an oblate spheroid in terms of its eccentricity 

 and semi-axes a and b may be written 



S = 2,ra 2 + — log—' (32) 



€ A. — € 



