A group-14 element is to be converted into n-type semiconductor by doping it with a suitalbe impurity. To which group this impurity belong?

Explanation

To convert a group-14 element into an n-type semiconductor through doping, we need to determine the suitable impurity and its group.

### Step-by-Step Solution:

1. **Understanding Group-14 Elements**:
- Group-14 elements, such as silicon (Si) and germanium (Ge), have four valence electrons. This means they can form four covalent bonds with neighboring atoms.

2. **Concept of Doping**:
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