Answer:
what?
Explanation:
i dint get it is there a joke or somthing
 
        
             
        
        
        
Answer:
it affects the hardness of the shells because calcium has a high reactivity which causes the shell to be hard
Explanation:
 
        
             
        
        
        
The particles that surround the neutrons are ELECTRONS
        
             
        
        
        
The rate mainly effects the size of the crystals in the rock forming