The Earth's structural zones (S-Zones) are the lithosphere, asthenosphere, mesosphere, inner core, and outer core.
C-Zone                 S-Zone                  What are they like?
 
Core                      Inner Core           Found about 2,900 kilometers below 
the Earth's surface. It is about 2,300 kilometers thick
 
        
             
        
        
        
All inside and out in the human body
        
             
        
        
        
There can only be two electrons in the innermost shell of an atom so b is the correct answer
        
             
        
        
        
Explanation:
The reaction between calcium hydroxide and nitric acid is as follows.
   
Number of reactant atoms are as follows.
Number of product atoms are as follows.
To balance the given chemical equation, multiply 
 by 2 on reactant side and multiply 
 by 2 on the product side.
Therefore, the balanced chemical equation will be as follows.
     