When a nucleus of a radioactive isotope decays, it forms a nucleus and emitted radiation. What are the products?
- Aa nucleus of an element different from the isotope is formed and both an $\alpha$-particle and $\gamma$-radiation are emitted
- Ba nucleus of an element different from the isotope is formed and just $\gamma$-radiation is emitted
- Ca nucleus of the same element as the isotope is formed and both $\beta$-particle and $\gamma$-radiation are emitted
- Da nucleus of the same element as the isotope is formed and just an $\alpha$-particle is emitted