Read the passage and answer the question.
Experiments performed have showed that radioactivity is a nuclear phenomenon in which an unstable nucleus undergoes a decay. This is referred to as radioactive decay. Three types of radioactive decay occur in nature :
- α-decay
- β-decay
- γ-decay
Consider that 92U238 decays via alpha decay.
What is the number of nucleons in the daughter nuclei?
Answer & explanation
Correct answer: option 3
Number of nucleons = mass number
In alpha decay, mass number decreases by 4.
Therefore, no. of nucleons = 238-4=234