The video tutorial explains the structure of a hexagonal closed packing (HCP) unit cell. It describes the arrangement and contribution of different types of atoms within the unit cell, including corner atoms, face centered atoms, and body centered atoms. The tutorial calculates the total number of atoms contributing to the HCP unit cell, concluding that there are six atoms in total.

How many corner atoms are present in a hexagonal closed packing (HCP) unit cell?

• 12

• 14

• 8

• 6

What is the contribution of each corner atom to the HCP unit cell?

• 1/8

• 1/6

• 1/4

• 1/12

How many face-centered atoms are there in an HCP unit cell?

• 4

• 1

• 2

• 3

What is the total number of atoms contributed by the body-centered atoms in an HCP unit cell?

• 1

• 2

• 3

• 4

What is the total number of atoms in a hexagonal closed packing (HCP) unit cell?

• 6

• 5

• 7

• 4