98 



Prof. II. Bunsen on Flame Reactions. 



Table of Volatile Elements which 





Metallic film. 



Oxide-film. 



Oxide-film 



with stannous 



chloride. 



Oxide-film 



with stannous 



chloride and 



soda. 



Oxide-film with 



silver-nitrate and 



ammonia. 





Te 



Black; thin 

 part brown. 



White. 



Black. 



Black. 



Yellowish white. 





Se 



Cherry-red ; 

 thin part 

 brick-red. 



White. 



Brick-red. 



Black. 



White. 





Sb 



Black ; thin 

 part brown. 



White. 



White. 



White. 



Black; insoluble 

 in ammonia. 





As 

 Bi 



Black ; thin 

 part brown. 



White. 



White. 



White. 



Lemon-yellow or 

 reddish brown ; 

 soluble in am- 

 monia. 





Black ; thin 

 part brown. 



Yellowish 

 white. 



White. 



Black. 



White. 





Hg 



Grey nonco- 

 herent thin 

 film. 













Tl 



Black ; thin 

 part brawn. 



White. 



White. 



White. 



White. 





Pb 



Black ; thin 

 part brown. 



Yellow-ochre 

 colour. 



White. 



White. 



White. 





Cd 



Black ; thin 

 part brown. 



Blackish 



brown; thin 



part white. 



White. 



White. 



White; in the 

 thin parts turns 

 bluish black. 





Zn 



Black ; thin 

 part brown. 



White. 



White. 



White. 



White. 





Sn 



Black ; thin 

 part brown. 



Yellowish 

 white. 



White. 



White. 



White. 





