`.^(65)Cu` will turn into `.^(66)Cu` if it is bombarded will

Options

A. Protons
B. Neutrons
C. Electrons
D. Alpha particles

Answer

To solve the problem of how \(^{65}\text{Cu}\) turns into \(^{66}\text{Cu}\) when bombarded, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Isotope Notation**:
- The notation \(^{A}\text{X}\) represents an isotope where \(A\) is the mass number (total number of protons and neutrons) and \(X\) is the chemical symbol of the element. For copper, \(^{65}\text{Cu}\) has a mass number of 65.

2. **Identify the Reaction**:
- We want to convert \(^{65}\text{Cu}\) to \(^{66}\text{Cu}\). This means the mass number must increase by 1.

3. **Determine the Change in Mass Number**:
- The mass number of \(^{65}\text{Cu}\) is 65, and for \(^{66}\text{Cu}\) it is 66. The increase in mass number indicates that one additional nucleon (either a proton or a neutron) is added.

4. **Conservation of Atomic Number**:
- The atomic number of copper (Cu) is 29, which means it has 29 protons. Since the product is still copper, the number of protons must remain the same.

5. **Identify the Bombarding Particle**:
- Since the atomic number does not change, the only way to increase the mass number from 65 to 66 without changing the number of protons is to add a neutron.

6. **Write the Reaction**:
- The nuclear reaction can be represented as:
\[ ^{65}\text{Cu} + ^{1}\text{n} \rightarrow ^{66}\text{Cu} \]
- Here, \(^{1}\text{n}\) represents a neutron.

7. **Conclusion**:
- Therefore, \(^{65}\text{Cu}\) will turn into \(^{66}\text{Cu}\) if it is bombarded with a neutron.

### Final Answer:
\(^{65}\text{Cu}\) will turn into \(^{66}\text{Cu}\) if it is bombarded with a neutron.

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