A radioactive isotope of atomic number $\mathrm { Z }$ emits an alpha particle, and the daughter nucleus then emits a beta-minus particle. What is the atomic number of the resulting nucleus?
A) $Z - 2$
B) $Z - 3$
C) $Z + 1$
D) $Z - 1$

Question

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The Answer of A radioactive isotope of atomic number $\mathrm { Z }$ emits an alpha particle, and the daughter nucleus then emits a beta-minus particle. What is the atomic number of the resulting nucleus?
A) $Z - 2$
B) $Z - 3$
C) $Z + 1$
D) $Z - 1$

A Radioactive Isotope of Atomic Number Z\mathrm { Z }Z Emits an Alpha Particle, and the Daughter Nucleus Then Emits

A Radioactive Isotope of Atomic Number $\mathrm { Z }$ Emits an Alpha Particle, and the Daughter Nucleus Then Emits