Which of the following statements is(are) correct?

Options

A. The coordination number of each type of ion in CsCl crystal is 8
B. A metal that crystallizes in bcc structure has a coordination number 12
C. A unit cell of an ionic crystal shares some of its ions with other unit cells
D. The length of the unit cell in NaCl is 552 pm
`( r_(Na^(+)) = 95 "pm" , r_(Cl^(-)) = 181 "pm" )`

Explanation

To determine which statements are correct regarding the solid-state chemistry concepts, we will analyze each statement one by one based on the information provided in the video transcript.

### Step-by-step Solution:

1. **Statement 1: The coordination number of each type of ion in cesium chloride crystal is 8.**
- **Analysis:** In the cesium chloride (CsCl) crystal structure, Cs⁺ ions are located at the body center of the cubic unit cell, while Cl⁻ ions are located at the corners. Each Cs⁺ ion is surrounded by 8 Cl⁻ ions, and vice versa. Therefore, the coordination number for both Cs⁺ and Cl⁻ is indeed 8.
- **Conclusion:** This statement is **correct**.

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