494 Hackh — Modification of the Periodic Table. 



well known, close relationship not only in regard to their 

 forms of crystallization, their solubility, their melting- 

 points, but also in regard to their chemical behavior and 

 stability. This periodicity can be extended to the mono- 





























C > JT 







Pb 



Bi 







Nt 







Ra 





Th 





A 



11.25 



9.81 

















11.0 



A 



r 





Sn 



Sb 



Te 



I 



Xe 





Cs 



Ba 



La 



Ce 







7.29 



6.YI 



6.26 



4.9SS 



3.52 





1.88 



3. 78 



6.163 



6.68 







Ge 



As 



Se 



Br 



Kr 





Rb 



Sr 



Y 



Zr 







5.49 



4.6* 



4.26 



3.JS7 



2.155 





1.52. 



2.5 



Z.60 



4.IST 







Si 



p 



S 



CI 



Ar 





K 



Ca 



• Sc 



Ti 







2.49 



2.*6 



1.95 



1.33 



1.212, 





0.865 



1.575 



2.5 



4.87 







c 



N 







F 



Ne 





Na 



Mg 



Al 



Si 



i 



k 



2.2. 



0.80 



1.-134 



0.98S 



? 





0.97* 



1.743 



2.5S3 



2.49 









H 



He 





Li 



Be 



B 



c 



\ 



• 





0.O6I 



1.44 





0.594 



2.1 



2.68 



2.2. 



A 



Ti 



V 



Cr 



Mn 



Fe 



Co 



Ni 



Cu 



Zn 



Ga 



Ge 









4.87 



5.5 



6.50 



7.39 



7.8* 



8.65 



8.28 



8.945 



6.9,5" 



5.95" 



5.496 



> 



i 



Zr 



Cb 



Mo 





Ru 



Rh 



Pd 



Ag 



Cd 



In 



Sn 







4.15 



7.06 



9.oi 





12 .a6 



12.1 



11.4 



10*47 



8. 546 



7.4Z 



7.17* 







Ce 



p 



r Nd 





Sm 



Eu 





Gd 



Tb 



Dy 



Hoi 



Er 



Tm 





Yb 



Lu 









6.7 



6 



5" 6.9 





7.8 



? 





? 



? 



? 



? 1 



4.8 



? 





? 



? 





> 



< 





Ta 



W 





Os 



Ir 



Pt 



Au 



Hg 



Tl 



Pb 



\ 





] 



.6.6 



16.54 





22.48 



22. i5 



21.5 



19.2.6 



13.S9 



11.86 



11.25" 



T 



T 



Th 

 11.0 





U 



18.68 



1 cc EJ) at 18°C 



, 760 ram = l,oo 









5*. — ' 









L 





















Table IV. The specific gravity of the elements (calculated to H 2 = 1) 



chlorides of Cu, Ag, Au with the addition, however, that 

 in the lower half of the table the similarity along periods 

 dominates the similarity along groups; therefore the 

 properties of these chlorides, CuCl, AgCl, AuCl, will be 



