Energy released when electron is added to an isolated gases anion.

Explanation

To solve the question regarding the energy released when an electron is added to an isolated gaseous anion, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Terms**:
- First, we need to clarify what is meant by an "isolated gaseous anion." An anion is a negatively charged ion, which means it has gained one or more electrons.

2. **Defining Electron Affinity**:
- Electron affinity is defined as the amount of energy released when an electron is added to a neutral atom in the gas phase. However, when we are dealing with an anion, we are interested in the energy change that occurs when an additional electron is added to this already negatively charged species.

3. **Energy Change**:
- When an electron is added to an isolated gaseous anion, energy is released. This process can be thought of as the anion becoming a more negatively charged species (a dianion).

4. **Conclusion**:
- The energy released during this process is not typically referred to as "electron affinity" because that term usually applies to neutral atoms. However, the concept is similar, and we can say that the energy released when an electron is added to an isolated gaseous anion is related to the electron affinity of the anion.

5. **Final Answer**:
- The energy released when an electron is added to an isolated gaseous anion is associated with the concept of electron affinity, but it specifically pertains to the energy change in the context of anions.