The electron affinity of Be is almost similar to that of

Options

A. Li
B. B
C. Na
D. Ne

Answer

To determine which element has an electron affinity similar to that of beryllium (Be), we will analyze the electron configuration and the ability of each element to accept an additional electron.

### Step-by-Step Solution:

1. **Understand Electron Affinity**:
- Electron affinity is the energy change that occurs when an electron is added to a neutral atom. A higher electron affinity means the atom can more easily accept an electron.

2. **Identify Beryllium's Electron Configuration**:
- Beryllium (Be) has an atomic number of 4, and its electron configuration is \(1s^2 2s^2\). The \(2s\) orbital is fully filled, meaning it cannot accommodate another electron.

3. **Determine Beryllium's Electron Affinity**:
- Since the \(2s\) orbital is fully filled, beryllium has negligible or zero electron affinity. This means it does not favorably accept an additional electron.

4. **Evaluate Other Elements**:
- We will compare beryllium's electron affinity with other elements to find one that also has a similar electron affinity (close to zero).

5. **Check Lithium (Li)**:
- Lithium (Li) has an atomic number of 3 and an electron configuration of \(1s^2 2s^1\). The \(2s\) orbital has one electron, allowing it to accommodate one more electron. Thus, it has a positive electron affinity, so it is not similar to Be.

6. **Check Boron (B)**:
- Boron (B) has an atomic number of 5 and an electron configuration of \(1s^2 2s^2 2p^1\). The \(2p\) orbital has one electron, allowing it to accept an electron. Therefore, boron also has a positive electron affinity.

7. **Check Sodium (Na)**:
- Sodium (Na) has an atomic number of 11 and an electron configuration of \(1s^2 2s^2 2p^6 3s^1\). The \(3s\) orbital has one electron, so sodium can also accept an electron, indicating a positive electron affinity.

8. **Check Neon (Ne)**:
- Neon (Ne) has an atomic number of 10 and an electron configuration of \(1s^2 2s^2 2p^6\). The \(2p\) orbital is fully filled with six electrons, meaning it cannot accommodate any additional electrons. Thus, neon has an electron affinity of zero.

9. **Conclusion**:
- The only element with an electron affinity similar to that of beryllium (which is zero) is neon.

### Final Answer:
The electron affinity of beryllium is almost similar to that of neon.