In a hexagonal close-packed (HCP) structure, what is the coordination number? (2

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Question: In a hexagonal close-packed (HCP) structure, what is the coordination number? (2022)

Options:

Correct Answer: 12

Exam Year: 2022

Solution:

In a hexagonal close-packed (HCP) structure, the coordination number is 12, as each atom is in contact with 12 others.

In a hexagonal close-packed (HCP) structure, what is the coordination number? (2022)

In a hexagonal close-packed (HCP) structure, what is the coordination number? (2022)

Step 1: Understand what a coordination number is. It is the number of nearest neighbors surrounding an atom in a structure.
Step 2: Learn about the hexagonal close-packed (HCP) structure. It is a way atoms are arranged in a solid.
Step 3: Visualize the HCP structure. In HCP, each atom is surrounded by other atoms.
Step 4: Count how many atoms are directly touching one atom in the HCP structure. You will find that each atom is in contact with 12 other atoms.
Step 5: Conclude that the coordination number for HCP is 12.

Coordination Number – The coordination number refers to the number of nearest neighbors surrounding an atom in a crystal structure.
Hexagonal Close-Packed Structure – HCP is a type of crystal structure where atoms are packed closely together in a hexagonal arrangement.