Element having highest I.P. value is:

Options

A. Ne
B. He
C. Be
D. N

Answer

To determine which element has the highest ionization potential (I.P.) value among the given options (Neon, Helium, Beryllium, and Nitrogen), we can follow these steps:

### Step 1: Understand Ionization Potential
Ionization potential (I.P.) is the minimum energy required to remove an electron from a neutral atom in its gaseous state. Elements with a stable electronic configuration typically have higher ionization potentials.

**Hint**: Remember that elements with full outer shells (like noble gases) tend to have higher ionization potentials.

### Step 2: Write the Electronic Configurations
Let's write down the electronic configurations of the given elements:
- **Helium (He)**: 1s²
- **Beryllium (Be)**: 1s² 2s²
- **Nitrogen (N)**: 1s² 2s² 2p³
- **Neon (Ne)**: 1s² 2s² 2p⁶

**Hint**: Look for the stability of the electronic configurations. Noble gases have completely filled outer shells.

### Step 3: Analyze Stability
Among the given elements, Helium and Neon are noble gases with completely filled outer shells. Beryllium and Nitrogen have partially filled outer shells, making them less stable compared to the noble gases.

**Hint**: Noble gases are generally more stable and thus require more energy to remove an electron.

### Step 4: Compare Helium and Neon
While both Helium and Neon are noble gases, Helium has a smaller atomic size and a higher effective nuclear charge compared to Neon. This means that it holds onto its electrons more tightly, resulting in a higher ionization potential.

**Hint**: Consider atomic size and effective nuclear charge when comparing ionization potentials.

### Step 5: Conclusion
Based on the analysis, Helium has the highest ionization potential among the given elements. Therefore, the correct answer is:

**Helium (He)**

**Final Answer**: The element having the highest I.P. value is Helium.