NaCl crystal belongs to the crystal system

Options

A. hexagonal
B. cubic
C. tetragonal
D. orthorhombic

Explanation

To determine the crystal system to which NaCl (sodium chloride) belongs, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Structure of NaCl**:
- NaCl is an ionic compound that forms a crystal lattice structure.

2. **Understand the Crystal System**:
- Crystals are classified into different systems based on their geometric properties. The seven crystal systems are cubic, tetragonal, orthorhombic, hexagonal, rhombohedral, monoclinic, and triclinic.

3. **Examine Edge Lengths**:
- In a cubic crystal system, the lengths of the edges are equal. For NaCl, the edge lengths are denoted as A, B, and C. In the case of NaCl, A = B = C.

4. **Check Interfacial Angles**:
- The interfacial angles (alpha, beta, gamma) in a cubic system are all equal to 90 degrees. For NaCl, alpha = beta = gamma = 90°.

5. **Conclusion**:
- Since NaCl has equal edge lengths and all interfacial angles are 90 degrees, it belongs to the cubic crystal system.

### Final Answer:
NaCl crystal belongs to the cubic crystal system.

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