CADMIUM. 393 



show that 8 is the atomic weight of oxide . 



oxide of 

 Cadmium. cadmium. 



As cadmium unites with only one dose of 

 oxygen, it is obvious that the oxide is a com- 

 pound of one atom cadmium and one atom oxy- 

 gen j consequently, the atomic weight of cad- At <>m of 

 mium must be 7- This is corroborated by Strom- 

 eyer's experiments. He found that 100 cad- 

 mium, when oxydized, were converted into 

 114*352 of oxide of cadmium. Therefore, oxide 

 of cadmium is composed of 



Cadmium 100 or 6'96?7 

 Oxygen 14-352 - 1 



6*9677> the atomic weight of cadmium, deduced 

 from this experiment, approaches very nearly to 

 7, the number deduced from the sulphate. That 

 it should be rather less than 7 is not surprizing 5 

 for cadmium is so volatile a metal, that it is not 

 easy to expose it to heat, without some loss. 



Stromeyer likewise formed and analyzed some 

 alloys of cadmium. They deserve our attention, 

 because they serve to corroborate the accuracy 

 of the atomic weight which has been assigned to 

 cadmium. 



The alloy of cadmium and platinum is a com- Alloy of 



' cadmium 



Of and plati- 



num. 

 Platinum 46-02 or 12 



Cadmium 53-98 - 14-07 



100-00* 

 * Gilbert, LX. 209. 



