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        | Engineering  :: Nuclear Engineering |  | 
       
        
	 
	
	 
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                |  | The atomic number of an element is |  
                | | [A]. | the number of neutrons present in an atomic nucleus | [B]. | the number of protons present in an atomic nucleus |  | [C]. | the sum of the number of protons and neutrons present in an atomic nucleus | [D]. | the difference in the number of protons and neutrons present in an atomic nucleus | 
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