The three elements having chemical symbols of Si, B and Ge are

Options

A. all metals
B. all non-metals
C. Si is metal, B and Ge are non-metals
D. all metalloids

Answer

To determine the classification of the elements with the chemical symbols Si (Silicon), B (Boron), and Ge (Germanium), we can follow these steps:

### Step 1: Identify the Elements
- **Si**: Silicon
- **B**: Boron
- **Ge**: Germanium

### Step 2: Classify Each Element
- **Silicon (Si)**: Silicon is classified as a metalloid. It has properties of both metals and non-metals.
- **Boron (B)**: Boron is also classified as a metalloid. It exhibits characteristics of both metals and non-metals.
- **Germanium (Ge)**: Germanium is classified as a metalloid as well. It shares properties with both metals and non-metals.

### Step 3: Conclusion
Since all three elements (Silicon, Boron, and Germanium) are classified as metalloids, we can conclude that the correct answer to the question is:

**All three elements are metalloids.**

### Final Answer
**Option D: All metalloids.**

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