Concept explainers
The nucleus results from the two successive beta decay of thorium.
Explanation of Solution
Introduction:
The number of protons in a nucleus of the new radioactive material increases due to beta decay from the nucleus of initial radioactive material. The number of protons in the nucleus describes the atomic number of the element, so the atomic number of the element also increases by one in beta decay.
The atomic number of
The mass number in beta decay remains the same, but the mass number of new radioactive material increases by one unit also due to absorbing of one neutron by
Conclusion:
Thus, the new nucleus results in the two successive beta decay of
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