Which of the following species have maximum number of electrons ?

Options

A. Mg
B. C
C. `Na^(+)`
D. F

Answer

To determine which of the given species has the maximum number of electrons, we will analyze the electronic configurations of each species based on their atomic numbers.

### Step-by-Step Solution:

1. **Identify the Atomic Numbers**:
- Magnesium (Mg) has an atomic number of 12.
- Carbon (C) has an atomic number of 6.
- Sodium (Na) has an atomic number of 11.
- Fluorine (F) has an atomic number of 9.

2. **Write the Electronic Configuration**:
- **Magnesium (Mg)**:
- Electronic configuration: 1s² 2s² 2p⁶ 3s²
- Total electrons = 2 + 2 + 6 + 2 = 12 electrons.

- **Carbon (C)**:
- Electronic configuration: 1s² 2s² 2p²
- Total electrons = 2 + 2 + 2 = 6 electrons.

- **Sodium (Na)**:
- Electronic configuration: 1s² 2s² 2p⁶ 3s¹
- Total electrons = 2 + 2 + 6 + 1 = 11 electrons.
- For Na⁺ (sodium ion), one electron is removed:
- Electronic configuration: 1s² 2s² 2p⁶
- Total electrons = 2 + 2 + 6 = 10 electrons.

- **Fluorine (F)**:
- Electronic configuration: 1s² 2s² 2p⁵
- Total electrons = 2 + 2 + 5 = 9 electrons.

3. **Compare the Total Electrons**:
- Magnesium (Mg): 12 electrons
- Carbon (C): 6 electrons
- Sodium (Na⁺): 10 electrons
- Fluorine (F): 9 electrons

4. **Conclusion**:
- The species with the maximum number of electrons is Magnesium (Mg) with 12 electrons.

### Final Answer:
The species with the maximum number of electrons is **Magnesium (Mg)**.

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