Which one of the following is a possible nuclear reaction ?

Options

A. `._5^10 B + ._2^4 He rarr ._7^13N + ._1^1H`
B. `._93^239Np rarr ._94^239Pu + beta^- + overline v`
C. `._11^23Na + ._1^1 H rarr ._10^20 Ne + ._2^4 He`
D. `._7^11N + ._1^1H rarr ._6^12 C + beta^- + v`

Explanation

To determine which of the given nuclear reactions is possible, we need to analyze each reaction based on the conservation laws of mass, charge, and energy. Here's a step-by-step breakdown of the solution:

### Step 1: Understand the Conservation Laws
Nuclear reactions must obey the conservation of:
- **Mass Number** (total number of nucleons)
- **Charge** (total charge)
- **Energy**

### Step 2: Analyze Each Reaction
Let's denote the reactions as A, B, C, and D for analysis.

#### Reaction A:
- Nucleons: 14 (left side) vs. 14 (right side)
- Charge: Not conserved (check the specific charges)
- Conclusion: **Not possible** due to charge conservation.

#### Reaction B:
- Nucleons: 239 (left side) vs. 239 (right side)
- Charge: 93 (left side) vs. 93 (right side) (considering beta particle and anti-neutrino)
- Conclusion: **Possible** as both mass and charge are conserved.

#### Reaction C:
- Nucleons: 23 + 124 = 147 (left side) vs. 24 (right side)
- Charge: Check if the charge balances (sodium and hydrogen interaction)
- Conclusion: **Not possible** because sodium does not react with hydrogen in this way.

#### Reaction D:
- Nucleons: 12 (left side) vs. 12 (right side)
- Charge: Check if the charge balances
- Conclusion: **Not possible** due to charge conservation.

### Step 3: Final Conclusion
After analyzing all reactions, we find that:
- **Reaction A**: Not possible (charge not conserved)
- **Reaction B**: Possible (both mass and charge conserved)
- **Reaction C**: Not possible (sodium does not react with hydrogen this way)
- **Reaction D**: Not possible (charge not conserved)

Thus, the only possible nuclear reaction is **Reaction B**.