Which of the following effects is observed due to the emission of β- during the phenomenon of radioactivity?
Correct answer: B. Z increases by 1 and A remains same
- A. A increases by 1 and Z remains same
- B. Z increases by 1 and A remains same
- C. Z decreases by 1 and A remains same
- D. A decreases by 1 and Z remains same
Explanation
When a beta particle is emitted, a neutron in the nucleus is converted into a proton, which increases the atomic number Z by 1. However, the mass number A of the atom remains the same, since the mass of an electron or positron is negligible compared to that of a proton or neutron.For example:Therefore, the atomic number Z increases by 1, but the mass number A remains the same when a beta particle (B-) is emitted during radioactive decay.
Last updated
About Nuclear Physics
Atomic nuclei contain protons and neutrons, with nuclear size, mass defect and binding energy describing their stability. The work covers alpha, beta and gamma decay, decay equations, half-life and decay rate, along with radiation safety and medical applications such as imaging, radiotherapy and tracers.
Practise Nuclear Physics
1,254 free Nuclear Physics MCQs from Physics, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Exams that ask Physics questions like this
Physics is on 13 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.