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Study the table below and use it to answer the questions that follow. (The letters do not represent the actual symbols of the elements).

Element 
 Atomic
Number
 520 18 
 Atomic mass 1040 40 11 
  1. Select two letters that represent a pair of isotopes 
  2. Give the number of neutrons in an atom of element T

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  • S and T  
  • 11- 5 = 6 

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