288 



The Periodic Table. 



had the completed electronic arrangement for the series, in 

 accordance with the accepted theory, and would show clearly 

 that a new series was commenced by each of the alkali metals 

 of Group I. 



The present tables would rather suggest that Group 

 formed the commencement of each series. 









Diagram of the Modified Table. 













Hydrogen 



Period 



f 



H 



i 



Li Be B C 



He 



2 



N P lie 













Rare 

 Earths. 



Typical 



P 



f 



eriods -^ 



K- Ca Sc 



19 20 21 



Rb Sr Yt 

 37 36 39 



Cs Ba\ Par 



55 S6\Eart 



\S7-7 



Pa Ac 

 87 88 89 



3 4 . 

 Na Mg / 

 II i2 1 



7V V Cr Mn 

 22 23 24 25 



3 6 7 



v si p 



3 i4 15 I 



^ • \ 



re Co A//' 

 26 27 2d 



8 9 10 

 S CI A 

 5 17 18 



Cu Zn Ga 

 29 30 31 



32 

 Sn 



50 



Pb 



62 



33 

 Sb 

 51 



Bi 

 63 



^ Br 

 34- 35 

 Te I 

 52 53 



Po - 

 64- 85 



Kr 

 36 

 Xe 

 54 



Nt 

 86 



La 57 

 Ce 58 

 Pr 59 



Nd 60 

 - 61 

 S 3 62 

 Eu 63 

 Gd 64 

 Tb 65 



Lon 9 

 Periods 



Zr Nb Mo — 

 40 41 12 4-3 



Pa Rh 

 44 45 



Pa 

 46 



% 



Cd In 



48 49 



Dy 66 

 Ho 67 



el 

 ft* 



2 J Ta W — 

 73 74 75 



Os Ir 

 76 77 



Pt 

 76 



Au 

 79 



Hg Tl 



SO 81 



Er 68 

 Tm 69 

 Yb 70 

 Lu 71 





Th UX Z U 

 90 91 32 







- 72 



V 





Groups. 



1 II III 



!V V V/ VII VI 1 1 



1 



11 III 



IV 



1/ 



VI 



VII 









Sub groups. 



A 







B 













Moreover, as will be seen in the diagram, this places helium 

 in a separate series along with hydrogen, thus indicating the 

 innermost electronic grouping of 2, which is ignored in the 

 present tables, and also giving a relation for hydrogen, which 

 has hitherto failed to find a rational place at all. 



Of course the space between hydrogen and helium in the 

 diagram is not intended to represent unknown elements. 

 The Hydrogen Period contains only two elements, and is 

 thus shorter than the Typical Periods, just as they in turn 

 are shorter than the Long Periods. 



Inasmuch as the table has always been considered as 

 capable of being written on a cylinder, by imagining the 

 right-hand ed^e of the Table bent round so as to join the left 

 (which would bring Group VII next to Group 0), I think 

 this new arrangement cannot raise any serious objections, 

 while it has the distinct advantages outlined above. It is, 

 moreover, free from the intricacies which frequently appear 

 in revised forms of the table. 



Exeter College, Oxford. 

 May ICtb, 1921. 



