Problem: Identify the nuclide produced when neptunium-237 decays by alpha emission: 23793Np → 42He + ? Express your answer as an isotope using prescripts.

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We are asked what is the daughter nucleus produced when neptunium-237 decays by alpha emission


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:

23793Np ___ + 42He


Atomic mass of the daughter nuclide:

237 = x + 4

x = 237 – 4233


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Problem Details

Identify the nuclide produced when neptunium-237 decays by alpha emission: 23793Np → 42He + ? Express your answer as an isotope using prescripts.

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