Question 5 of 11
How to play
the game 		    
    Show Diagrams
 HgO      Hg  +    O2  
Hg-O Hg O-O  
Hg-O Hg O-O  
Hg-O Hg O-O  
Hg-O Hg O-O  
Hg-O Hg O-O  
Hg-O Hg O-O  
Hg-O Hg O-O