In a rock salt structure each `Cl^(-)` ion is surrounded by:

Options

A. `4Na^(+)` ions
B. `6Na^(+)` ions
C. `8Na^(+)` ions
D. `12Na^(+)` ions

Explanation

To solve the question regarding the arrangement of ions in a rock salt structure, we can follow these steps:

### Step 1: Understand the Rock Salt Structure
The rock salt structure is a type of ionic crystal structure commonly represented by sodium chloride (NaCl). In this structure, sodium ions (Na⁺) and chloride ions (Cl⁻) are arranged in a specific manner.

**Hint:** Remember that rock salt structure refers to the arrangement of Na⁺ and Cl⁻ ions in a crystal lattice.

### Step 2: Identify the Coordination Number
In a rock salt structure, each ion is surrounded by a certain number of oppositely charged ions. This number is referred to as the coordination number. For NaCl, the coordination number is 6.

**Hint:** Coordination number indicates how many ions of opposite charge surround a given ion.

### Step 3: Analyze the Arrangement
In the NaCl structure, each Na⁺ ion is surrounded by six Cl⁻ ions, and conversely, each Cl⁻ ion is surrounded by six Na⁺ ions. This arrangement leads to a stable ionic lattice.

**Hint:** Visualize the crystal lattice to see how each ion is surrounded by six others.

### Step 4: Conclusion
Thus, in a rock salt structure, each Cl⁻ ion is surrounded by six Na⁺ ions.

**Final Answer:** Each Cl⁻ ion is surrounded by six Na⁺ ions.

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