Chemical species bearing a negative charge on carbon and possessing eight electrons in its valence shell are called ........ .. .

Explanation

To answer the question, "Chemical species bearing a negative charge on carbon and possessing eight electrons in its valence shell are called ........ .. .", we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Definition**:
- We need to identify a chemical species that has a negative charge on a carbon atom and contains eight electrons in its valence shell.

2. **Identifying the Species**:
...