Q11 / 150 · MHT CET 2026 (11 April Shift 1) · Chemistry
What is the total number of spheres that surrounds the tetrahedral hole in the close-packed three-dimensional structure?
- A$2$
- Correct answerB$4$
- C$6$
- D$8$
Solution
A tetrahedral void is formed when a sphere of the second layer is placed exactly over the triangular void formed by three spheres of the first layer.
Thus, a tetrahedral hole is surrounded by $4$ spheres ($3$ in one layer and $1$ in the adjacent layer).
The coordination number of a tetrahedral void is $4$.
Answer: $4$
Thus, a tetrahedral hole is surrounded by $4$ spheres ($3$ in one layer and $1$ in the adjacent layer).
The coordination number of a tetrahedral void is $4$.
Answer: $4$
Hence, the correct answer is option: 'B'.