The term hydride gap refers to which region of periodic table?

Options

A. Groups 6 to 9
B. groups 7 to 9
C. groups 7 to 10
D. groups 5 to 7

Answer

To answer the question regarding the term "hydride gap" and its relation to the periodic table, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Hydrides**:
- Hydrides are compounds formed when hydrogen combines with other elements. The nature of these compounds can vary based on the electronegativity of the other element involved.

2. **Identifying Electronegativity**:
- Electronegativity is a measure of how strongly an atom attracts electrons in a bond. Elements with low electronegativity tend to form hydrides more readily with hydrogen.

3. **Analyzing the Periodic Table**:
- When examining the periodic table, we can see that hydrides are typically formed with elements from groups where the electronegativity is relatively low.

4. **Recognizing the Hydride Gap**:
- The hydride gap refers to the absence or very limited formation of stable hydrides in certain regions of the periodic table. Specifically, this gap is observed in groups 7 (Group VIIA), 8 (Group VIIIA), and 9 (Group IB).

5. **Conclusion**:
- Therefore, the hydride gap is identified in the regions of the periodic table corresponding to groups 7 to 9, where the formation of stable hydrides is not typically observed due to high electronegativity of the elements in these groups.

### Final Answer:
The term "hydride gap" refers to the region of the periodic table encompassing groups 7 to 9.