If you melt and cool silicon dioxide under very special conditions 
<span>in the laboratory we can grow a single </span>crystalline<span> form of </span>
<span>silicon dioxide that we call quartz. In quartz crystals all of </span>
<span>the molecules are aligned and bonded together in a regular three </span>
<span>dimensional tetrahedral structure forming a very hard, transparent </span>
<span>material with special electronic properties. </span>
        
             
        
        
        
Answer:
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Explanation:
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WHAT IS AN IONIC BOND


kossel explained that inert gases r inert due to the electronic configuration which contains 8 electrons in their outermost shell 
And other elements loss and gain electrons to form ions and to have electronic configuration same as Noble gas and to get stable 
 
 
 
 
#SARDAR JI.
 
        
                    
             
        
        
        
Answer:
When solutions of sodium carbonate and hydrochloric acid are mixed, the equation for the hypothetical double displacement reaction is: Na2CO3 + 2 HCl → 2 NaCl + H2CO3 Bubbles of a colorless gas are evolved when these solutions are mixed. 
 
        
             
        
        
        
Answer:
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Explanation:
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