Reactant nuclei and product nuclei

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SUMMARY

The discussion centers on the nuclear reaction where 23Na captures a neutron to form 24Na. It is established that the mass of 23Na decreases as it transforms into 24Na, while the mass of 24Na initially increases due to production but eventually decreases due to decay. The equilibrium state is characterized by a constant production rate of 24Na, leading to a net increase in its quantity over time, despite the decay process. The confusion arises from the dynamics of mass changes during the reaction and the time-dependent behavior of the isotopes.

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Homework Statement


in the photo, the 23Na form 24Na Am i right?

if i am right, the mass of 23Na should decraese , and mass of 24Na should increase.
but why the solution provided is the mass of 24Na decreses and increases at the time of delta t ?? i can't understand

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23Na can capture a neutron to become 24Na.
The number of 23Na atoms decreases, but at a negligible rate.
The number of 24Na atoms increases by the production and decreases from the decays - if you start from 0 and have a constant production rate the net effect is always an increase (but getting slower and slower close to the equilibrium), and this is represented by the formula.
 

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