When a Pd-106 nuclide is struck with an alpha particle, a proton is produced along with a new nuclide. The new nuclide is Ag-109.
What are alpha particles?
Alpha particles (a) are made up of two protons and two neutrons that are tightly bound together.
They are emitted from the nucleus of some radionuclides during alpha decay, a type of radioactive decay.
Thus, the correct option is D, Ag-109.
Learn more about alpha particles
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