Most suitable element for nuclear fission is the element with a atomic mass near

Options

A. 11
B. 21
C. 52
D. 92

Answer

To determine the most suitable element for nuclear fission, we need to analyze the concept of binding energy per nucleon and its relationship with the atomic mass of elements. Here’s a step-by-step solution:

### Step 1: Understanding Binding Energy
- **Binding Energy** is the energy required to disassemble a nucleus into its constituent protons and neutrons. The **binding energy per nucleon** indicates the stability of the nucleus; higher values mean greater stability.

### Step 2: Analyzing the Binding Energy Curve
- The binding energy per nucleon varies with atomic mass. Typically, elements with atomic mass numbers around 40 to 55 have high binding energy per nucleon, indicating they are stable.

### Step 3: Identifying Suitable Elements for Fission
- For nuclear fission, we are interested in elements that can split into smaller nuclei, resulting in an increase in binding energy per nucleon. This means that the original nucleus must have a lower binding energy per nucleon compared to the products of the fission.

### Step 4: Evaluating Atomic Mass Numbers
- Elements with atomic mass numbers significantly higher than the stable range (around 40-55) are more likely to undergo fission.
- For instance, Uranium-235 (atomic mass ~235) and Plutonium-239 (atomic mass ~239) are known to be suitable for fission because when they undergo fission, they break into smaller nuclei that have higher binding energy per nucleon.

### Step 5: Conclusion
- The most suitable element for nuclear fission is one with an atomic mass near **92**, which corresponds to Uranium-235. This is because when it undergoes fission, it produces more stable products with higher binding energy per nucleon.

### Final Answer
The most suitable element for nuclear fission is the element with an atomic mass near **92**.

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