6 STROMEYER, Grouping of Chemical Elements. 



Elements. 



Atomic 

 Weights. 



Group 

 Position. 



Calculated 

 At.Wt. 



Difference. 



Group VI. 



Mean position, 5*27. 



Oxygen 







i6'oo 



5-22 

 5"46 



1608 



-0-08 



Chromium 



Cr 



52-10 



5 r 5 2 



+ 0-58 



Molybdenum... 



Mo- 



96-00 



5'M 



9638 



-0-38 



Neodymium ... 



Nd 



143-60 



5' 2 4 



143-68 



-0-08 



Tungsten 



W 



184-00 



4"o3 



187-50 



- 3'5° 



Uranium 



U 



238-50 



7 -8r 



231-60 



+ 6-90 



Group VII. 



Mean position, 6-64. 





F 



19-00 



6-85 



18-62 



+ 0-38 



Manganese ... 



Mn 



55'°° 



6-44 



55" 6 4 



-0-64 



Samarium 



Sa 



150-00 



7"5° 



147-60 



+ 2-40 



Group VII^. 



Mean position, 6-82. 



Iron 



Fe 

 Ru 



Os 



55"9° 

 101*70 



191-00 



6-73 



7'22 



6-51 



54-20 

 IOO *55 



191-87 



- 0*70 

 + 1-15 



-0-87 



Ruthenium ... 

 Osmium 





