PHYSICS 7408
Imperial Valley College
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Stuvia-1113656-aqa-a-level-physics-paper-1-2019-question-paper
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---41januari 20232022/2023
- Two isotopes of iodine are 125 
53 I and 131 
53 I. 
Determine, for these two isotopes, the difference between the constituents of the 
nuclei. 
[1 mark] 
0 1 . 2 A 131 
53 I nuclide undergoes beta (β– 
) decay to form a xenon nuclide. 
State the nucleon number of the xenon nuclide. 
[1 mark] 
0 1 . 3 A 125 
53 I nuclide decays by electron capture to form a tellurium nuclide. 
State two differences between the constituents of the iodine nucleus and the tellurium 
nucleus it decays into. 
[2 m...
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