The video tutorial explains the packing arrangement of crystals, where particles are assumed as solid spheres to maximize space and density. It introduces the concept of coordination number, which is the count of nearest neighbors around a particle. The tutorial covers three types of packing: one-dimensional, two-dimensional, and three-dimensional, with a focus on one-dimensional packing where each particle contacts two neighbors, resulting in a coordination number of two.

What is the primary goal of arranging particles in a crystal?

• To create more empty spaces

• To increase the size of the crystal

• To achieve maximum density

• To reduce the number of particles

What does the coordination number represent in a crystal structure?

• The size of the crystal

• The number of nearest neighbors around a particle

• The number of empty spaces in the crystal

• The number of particles in the crystal

Which of the following is NOT a type of packing arrangement in crystals?

• Close packing in one dimension

• Close packing in two dimensions

• Close packing in four dimensions

• Close packing in three dimensions

In one-dimensional close packing, how many neighboring spheres is each particle in contact with?

• Four

• Three

• Two

• One

What is the coordination number in one-dimensional close packing?

• One

• Two

• Three

• Four