Atom consist of electrons , protons and neutrons . If the mass attributed to neutron were halved and that attributed to the electrons were doubled , the atomic mass of ` 6C^(12)` would be approximately :

Options

A. remain approximately the same
B. be doubled
C. approximately be halved
D. be reduced by approximately 25%

Explanation

To solve the problem, we need to analyze the atomic mass of Carbon-12 (C-12) given the changes in the masses of neutrons and electrons.

### Step-by-Step Solution:

1. **Identify the Components of C-12**:
- Carbon-12 has an atomic number of 6, which means it has 6 protons.
- The atomic mass of C-12 is 12, which is the sum of protons and neutrons.

2. **Calculate the Number of Neutrons**:
- The number of neutrons can be calculated using the formula:
\[ \text{Number of Neutrons} = \text{Atomic Mass} - \text{Number of Protons} \]
- For C-12:
\[ \text{Number of Neutrons} = 12 - 6 = 6 \]

3. **Adjust the Mass of Neutrons**:
- According to the problem, if the mass attributed to neutrons is halved, the new number of neutrons will be:
\[ \text{New Number of Neutrons} = \frac{6}{2} = 3 \]

4. **Calculate the New Atomic Mass**:
- The atomic mass is calculated as the sum of the number of protons and the new number of neutrons:
\[ \text{New Atomic Mass} = \text{Number of Protons} + \text{New Number of Neutrons} \]
- Substituting the values:
\[ \text{New Atomic Mass} = 6 + 3 = 9 \]

5. **Conclusion**:
- The approximate new atomic mass of C-12, after halving the mass of neutrons, is 9.

### Final Answer:
The atomic mass of \( ^{12}C \) would be approximately 9.

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