Would extra mass in the crucible cause the "mass of oxygen" to come out too high or too low? Explain.
1 answer:
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Answer:
A. Alpha decay followed by emission
Explanation:
The given nuclide is thorium-232
The product formed in the decay of thorium-232 is actinium -228
the difference between the atomic number is 1 (90-89)
the difference between the mass number is 1 (232-228)
A decrease in mass number by 4 and atomic number by 2 indicates an alpha decay.
now to get ^{228}_{89}Ac from ^{228}_{88}Ra, Radium undergoes beta emission to increase the atomic number by 1 and no change in the mass number.
Thus alpha decay followed by beta emission gives Ac-228
hence option A is correct