Mark out the coreect statemnet (s).

Options

A. In fission and fusion processes, the mass of reactant nuclide is greater than the mass of product nuclide.
B. In fission process, BE per nucleon of reactant nucleide is less than the binding energy per nucleon of product nucleide.
C. In fusion process, BE per nucleon of reactant nucleide is less than the binding energy per nucleon of product nucleide.
D. In fusion process, BE per nucleon of reactant nucleide is greater than the binding energy per nucleon of product nucleide.

Explanation

To solve the question of identifying the correct statements regarding nuclear fission and fusion, we will follow these steps:

### Step 1: Understand the Concepts of Fission and Fusion
- **Fission** is the process where a heavy nucleus splits into two or more lighter nuclei, releasing energy.
- **Fusion** is the process where two light nuclei combine to form a heavier nucleus, also releasing energy.

### Step 2: Analyze Mass and Binding Energy
- In both fission and fusion, the mass of the reactants is greater than the mass of the products. This is due to the mass-energy equivalence principle (E=mc²), where the "missing" mass is converted into energy.
- The **binding energy** is the energy required to disassemble a nucleus into its constituent protons and neutrons. The higher the binding energy per nucleon, the more stable the nucleus.

### Step 3: Evaluate the Statements
1. **Statement A**: In the fusion process, the mass of the reactant nuclide is greater than the mass of the product nuclide.
- This statement is **true** because, in fusion, the total mass of the reactants (two light nuclei) is greater than the mass of the single heavier nucleus formed.

2. **Statement B**: In the fusion process, the binding energy per nucleon of the reactant nuclide is less than the binding energy of the product nuclide.
- This statement is **true**. The reactants (light nuclei) have lower binding energy per nucleon compared to the product (heavier nucleus), which is more stable.

3. **Statement C**: In the fusion process, the binding energy per nucleon of the reactant nuclide is greater than the binding energy per nucleon of the product nuclide.
- This statement is **false**. As stated earlier, the binding energy per nucleon of the reactants is less than that of the products.

### Conclusion
- The correct statements are **B and A**.

### Final Answer
- The correct statements are **B and A**.

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