﻿444 Prof. W. L. Bragg and Messrs, James and Bosanquet : 



total number of electrons in the atom is represented by the 

 area included between the curves and the axis. 



Fig. 4. 













































































i 









. 











Distance from centre of atom in Angstrom units. 



The following table shows the agreement between the 

 F curves found experimentally and those calculated from 

 the electron distributions : — 



Table I. — Sodium. 



Sin 6. 01. 0-2. 0-3. 



0-4. 



0-5. 



^Observed 8-32 



540 



3-37 



2-02 



076 



pj Shells (0;29A| g . 56 



5-59 



333 



219 



0-93 



1 



^ Smooth Curve ... 8*S7 



5-40 



3-20 



1-91 



1-00 



Table II. — Chlorine. 



Sin0. 



0-1. 



0-2. 



0- 



0-4. 



05. 



Observed 12*72 



7-85 



5-79 



4-40 



3-16 



773 



5-90 



4-61 



2-69 



7-80 



5-55 



410 



3-20 



f 0-25 A \ 

 F { Shells \ 086 V 12-53 

 | I T46 j 



^Smooth Curve ... 12-70 



6. We have also made an approximate calculation ©f the 

 F curve to be expected from an atom of the type pro- 

 posed by Bohr *, In the ionized sodium atom containing 



* Nature, cvii. p. 104 (1921). 



