identify the nuclide produced when neptunium-237 decays by alpha emission: 237 93np→42he + ?



let me rewrite the equation
23793Np→42He + ?
 after the missing , will have an atomic number of 91 and a mass number of 223              after an alpha decay
23793Np→42He + 23391Pa
 and the nuclide is protactinium.

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