The process requiring the absorption of energy is

Options

A. `FtoF^(-)`
B. `ClltCl^(-)`
C. `OtoO^(2-)`
D. `HtoH^(-)`

Answer

To answer the question "The process requiring the absorption of energy is," we need to analyze the different processes involved in the conversion of neutral atoms to their corresponding anions. Here’s a step-by-step breakdown of the solution:

### Step 1: Understanding Ionization and Electron Affinity
- **Ionization Energy**: The energy required to remove an electron from a neutral atom to form a cation.
- **Electron Affinity**: The energy change that occurs when an electron is added to a neutral atom to form an anion.

### Step 2: Analyzing the Given Options
- We need to evaluate the processes for different elements to determine which one requires energy absorption.

### Step 3: Evaluating Each Element
1. **Fluorine (F to F-)**:
- Fluorine gains an electron to become F-. This process releases energy, indicating that it does not require energy absorption.

2. **Chlorine (Cl to Cl-)**:
- Similar to fluorine, chlorine also releases energy when it gains an electron to form Cl-. Thus, this process also does not require energy absorption.

3. **Hydrogen (H to H-)**:
- When hydrogen gains an electron to become H-, energy is released. Therefore, this process does not require energy absorption.

4. **Oxygen (O to O2-)**:
- The first step involves oxygen gaining one electron to form O-. This process releases energy (negative ΔH). However, to convert O- to O2-, energy must be absorbed (positive ΔH). This indicates that this process requires energy absorption.

### Step 4: Conclusion
- The process that requires the absorption of energy is the conversion of O- to O2-. Therefore, the correct answer is the process involving oxygen.

### Final Answer
The process requiring the absorption of energy is the conversion of O- to O2-.

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