Which of the following is a metalloid?

Options

A. K
B. Ge
C. Ce
D. Zn

Answer

To determine which of the given elements is a metalloid, we will analyze each option based on their properties and their position in the periodic table.

### Step-by-Step Solution:

1. **Identify the Elements**: The options provided are:
- A) K (Potassium)
- B) Ge (Germanium)
- C) Ce (Cerium)
- D) Zn (Zinc)

2. **Understand the Classification**: Elements are categorized into three main types based on their properties:
- Metals (typically found on the left side of the periodic table)
- Non-metals (found on the right side)
- Metalloids (elements that have properties intermediate between metals and non-metals, typically found along the zig-zag line on the periodic table)

3. **Check Each Element**:
- **Potassium (K)**: Located in Group 1 of the periodic table, it is a metal (blue color).
- **Germanium (Ge)**: Located in Group 14, it is positioned along the zig-zag line and is classified as a metalloid (light green color).
- **Cerium (Ce)**: Located in the lanthanide series, it is a metal (blue color).
- **Zinc (Zn)**: Located in Group 12, it is also a metal (blue color).

4. **Identify the Metalloid**: From the analysis:
- Potassium is a metal.
- Germanium is a metalloid.
- Cerium is a metal.
- Zinc is a metal.

5. **Conclusion**: The only metalloid among the given options is **Germanium (Ge)**.

### Final Answer:
**B) Ge (Germanium)** is the metalloid.

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