Chemistry-
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Question

blank subscript 88 end subscript superscript 228 end superscript X minus 3 alpha minus beta ⟶ YThe element Y is:

  1. blank subscript 82 end subscript superscript 216 end superscript P b    
  2. blank subscript 82 end subscript superscript 217 end superscript P b    
  3. blank subscript 83 end subscript superscript 218 end superscript B i    
  4. blank subscript 83 end subscript superscript 216 end superscript B i    

The correct answer is: blank subscript 82 end subscript superscript 217 end superscript P b

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