We are asked what is the daughter nucleus produced when 217(At) undergoes alpha decay
Recall that in a nuclear reaction, the number of protons and neutrons are affected and the identity of the element changes. For alpha decay, an alpha particle (42α, atomic mass = 4, atomic number = 2) is formed as a product.
The incomplete nuclear equation is:
21785 At → ___ + 42α
Atomic mass of the daughter nuclide:
217 = x + 4
x = 217 – 4 = 213
What is the daughter nucleus produced when 217(At) undergoes alpha decay?
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