I.P is maximum for :-

Options

A. Li
B. Ne
C. Be
D. B

Answer

To solve the question regarding which element has the maximum ionization potential (I.P) among lithium, neon, beryllium, and boron, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Ionization Potential (I.P)**:
- Ionization potential is defined as the energy required to remove an electron from a gaseous atom. The higher the energy required, the higher the ionization potential.

2. **Analyzing the Given Elements**:
- We have four elements to consider: lithium (Li), neon (Ne), beryllium (Be), and boron (B).

3. **Electronic Configurations**:
- **Lithium (Li)**: The electronic configuration is \(1s^2 2s^1\). Removing one electron from lithium results in a stable noble gas configuration (helium).
- **Neon (Ne)**: The electronic configuration is \(1s^2 2s^2 2p^6\). Neon has a fully filled outer shell, which is very stable. Removing an electron from neon requires a significant amount of energy.
- **Beryllium (Be)**: The electronic configuration is \(1s^2 2s^2\). Removing one electron from beryllium also leads to a stable configuration (helium), but it is less stable than neon.
- **Boron (B)**: The electronic configuration is \(1s^2 2s^2 2p^1\). Removing one electron from boron results in a configuration of \(1s^2 2s^2\), which is stable but requires less energy than removing an electron from neon.

4. **Comparison of Ionization Potentials**:
- **Lithium**: Lower I.P. due to its tendency to lose one electron to achieve a noble gas configuration.
- **Neon**: Highest I.P. because it has a stable electronic configuration and requires a lot of energy to remove an electron.
- **Beryllium**: Higher I.P. than lithium but lower than neon due to its stable configuration.
- **Boron**: Intermediate I.P. as it is easier to remove an electron compared to neon.

5. **Conclusion**:
- Among lithium, neon, beryllium, and boron, **neon** has the maximum ionization potential due to its fully filled and stable electronic configuration.

### Final Answer:
**Neon (Ne) has the maximum ionization potential.**