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Atomic mass of the first 20 elements

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Question
Answer
Hydrogen   1.01  
Helium   4.00  
Lithium   6.94  
Beryllium   9.01  
Boron   10.81  
Carbon   12.01  
Nitrogen   14.01  
Oxygen   16.00  
Flourine   19.00  
Neon   20.18  
Sodium   22.99  
Magnesium   24.31  
Aluminum   26.98  
Silicon   28.09  
Phosphorus   30.97  
Sulfur   32.07  
Chlorine   35.45  
Argon   39.95  
Potassium   39.10  
Calcium   40.08  


   


 

 

 

 

 

 
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