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Atomic number after a beta-emission from...

Atomic number after a `beta`-emission from a nucleus having atomic number 40, will be:

A

36

B

39

C

41

D

44

Text Solution

AI Generated Solution

The correct Answer is:
To solve the question regarding the atomic number after a beta emission from a nucleus with an atomic number of 40, we can follow these steps: ### Step-by-Step Solution: 1. **Identify the Initial Atomic Number**: We have a nucleus with an atomic number (Z) of 40. Let's denote this nucleus as X, where Z = 40. 2. **Understand Beta Emission**: In beta minus (β-) emission, a neutron in the nucleus is converted into a proton, and an electron (beta particle) is emitted. This process increases the atomic number by 1 while the mass number remains unchanged. 3. **Determine the Change in Atomic Number**: Since one neutron is converted into one proton, the atomic number of the new nucleus will be: \[ Z' = Z + 1 \] Substituting the initial atomic number: \[ Z' = 40 + 1 = 41 \] 4. **Conclusion**: Therefore, after beta emission, the atomic number of the new nucleus will be 41. ### Final Answer: The atomic number after beta emission from a nucleus with an atomic number of 40 will be **41**. ---
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