Vhat is the daughter nucleus (nuclide) produced when 90Sr undergoes beta decay by emitting an electron? Replace each uestion mark with the appropriate integer or symbol. What is the daughter nucleus (nuclide) produced when 217 At undergoes alpha decay? Replace the question marks with the proper integers or symbols. daughter nucleus (nuclide): What is the daughter nucleus (nuclide) produced when 90Sr undergoes beta decay by emitting an electron? Replace each question mark with the appropriate integer or symbol. daughter nucleus (nuclide)