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.
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