How many silicon atoms are present in the atom are present in the anion of a pyrosilicates ?

Answer

To determine how many silicon atoms are present in the anion of a pyrosilicate, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Definition of Pyrosilicates**:
Pyrosilicates are a type of silicate mineral that contains silicon and oxygen. The general formula for pyrosilicates can be represented as \( \text{Si}_2\text{O}_7^{2-} \).

2. **Identify the Formula**:
The chemical formula for the pyrosilicate anion is \( \text{Si}_2\text{O}_7^{2-} \). This indicates that there are two silicon atoms in the anion.

3. **Count the Silicon Atoms**:
From the formula \( \text{Si}_2\text{O}_7^{2-} \), we can see that the subscript '2' next to silicon (Si) indicates that there are 2 silicon atoms.

4. **Conclusion**:
Therefore, the number of silicon atoms present in the anion of a pyrosilicate is 2.

### Final Answer:
There are 2 silicon atoms present in the anion of a pyrosilicate.

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