States of Matter Overview

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Questions and Answers

Which of the following statements about the coordination number is true?

It represents the number of atoms surrounding a single atom in a crystal lattice. (correct)
A higher coordination number indicates a less dense packing of atoms.
The coordination number is always the same for all crystal structures.
It is a measure of the distance between atoms in a crystal lattice.

In the simple cubic (SC) structure, what is the coordination number?

12
4
8
6 (correct)

Which of the following statements about the body-centered cubic (BCC) structure is correct?

Atoms touch each other along the cube diagonals. (correct)
It has the lowest packing density among the three cubic structures.
It has the highest packing density among the three cubic structures.
Atoms touch each other along the cube edges.

What is the packing density of the face-centered cubic (FCC) structure?

74% (A) Signup and view all the answers

Which of the following statements about the unit cell is true?

It is the smallest repeating unit that defines the crystal structure. (D) Signup and view all the answers

What is the coordination number for a hexagonal close-packed (HCP) structure?

12 (C) Signup and view all the answers

Which of the following statements about isotropic and anisotropic materials is correct?

Isotropic materials have properties that are the same in all directions, while anisotropic materials have properties that differ in different directions. (C) Signup and view all the answers

According to the kinetic theory, how do substances dissolve in a solution?

The solvent molecules collide with the solute molecules, transferring energy to them and causing them to dissociate. (C) Signup and view all the answers