Unit Cell Characteristics and Atoms

The video tutorial on solid states covers the number of atoms in different types of unit cells, including primitive, body-centered, face-centered, and end-centered. It explains how atoms are arranged and shared among unit cells, using open and space-filling structures for visualization. The tutorial also discusses lattice points, unit cell parameters, and compares hexagonal and monoclinic unit cells. The differences between face-centered and end-centered unit cells are highlighted, providing a comprehensive understanding of unit cell structures.

In a primitive unit cell, how many atoms are effectively present?

• Four

• Two

• Eight

• One

How many atoms are effectively present in a body-centered unit cell?

• Four

• Two

• One

• Three

In a body-centered unit cell, how many atoms are located at the center?

• Two

• None

• One

• Four

In a face-centered unit cell, how many atoms are effectively present?

• Three

• Four

• Two

• One

Which unit cell type has atoms at all the faces?

• Primitive

• End-centered

• Body-centered

• Face-centered

How many atoms are effectively present in an end-centered unit cell?

• Two

• One

• Three

• Four

Which unit cell type has atoms at the center of two opposite faces?

• Primitive

• Body-centered

• End-centered

• Face-centered

Which of the following parameters characterize a unit cell?

• Type of atoms

• Number of atoms

• Color of atoms

• Length of edges and angles

What is the angle gamma in a hexagonal unit cell?

• 180°

• 120°

• 60°

• 90°

In a monoclinic unit cell, which of the following is true about the sides?

• All sides are equal

• Two sides are equal

• No sides are equal

• All sides are perpendicular