In ccp arrangement the pattern of successive layers can be designated as

Options

A. AB AB AB
B. ABC ABC ABC
C. AB ABC AB
D. ABA ABA ABA

Answer

To solve the question regarding the pattern of successive layers in a CCP (Cubic Close Packing) arrangement, we can follow these steps:

### Step 1: Understand the CCP Arrangement
In a CCP arrangement, spheres are packed in a three-dimensional structure. The arrangement consists of layers where each sphere touches others in the layer above and below it.

**Hint:** Visualize the arrangement of spheres in layers to understand how they are positioned relative to each other.

### Step 2: Draw the Structure
Draw a diagram of the CCP arrangement. You will notice that:
- The first layer (Layer A) has spheres arranged in a hexagonal pattern.
- The second layer (Layer B) is placed in the depressions of the first layer.
- The third layer (Layer C) is placed in the depressions of the second layer.

**Hint:** Label the layers as A, B, and C to identify their positions clearly.

### Step 3: Identify the Pattern of Layers
In the CCP arrangement, the pattern of layers repeats every three layers. Specifically:
- The first layer (A) is repeated in the fourth layer (A).
- The second layer (B) is repeated in the fifth layer (B).
- The third layer (C) is repeated in the sixth layer (C).

**Hint:** Look for the repetition of the layers to determine the sequence.

### Step 4: Designate the Layer Pattern
Since the layers repeat in the order of A, B, C, the designation for the pattern of successive layers in a CCP arrangement is ABC.

**Hint:** Remember that the repeating sequence is crucial for identifying the correct answer.

### Step 5: Choose the Correct Option
Given the options, the correct designation for the pattern of successive layers in the CCP arrangement is option B: ABC.

**Hint:** Cross-check your answer with the options provided to ensure accuracy.

### Final Answer
The pattern of successive layers in a CCP arrangement can be designated as **ABC**.