Four Classes of Solids Overview

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Which of the following forces hold molecules together in molecular solids?

Covalent bonds

Metallic bonds

Ionic bonds

Van der Waals forces (correct)

What is the atomic packing factor (APF) for a simple cubic (SC) crystal structure?

1.00

0.68

0.52 (correct)

0.74

Which crystal structure has the highest atomic packing factor?

Body-centered cubic (BCC)

Hexagonal close-packed (HCP)

FCC and HCP have the same highest packing factor (correct)

Face-centered cubic (FCC)

What is the stacking sequence of atoms in a hexagonal close-packed (HCP) structure?

ABAB Signup and view all the answers

Which of the following material classes typically has the highest density?

Metals Signup and view all the answers

What is the term used to describe a material that exhibits different crystal structures under different conditions?

Polymorphism Signup and view all the answers

Which of the following statements about single crystals is true?

Their properties are anisotropic Signup and view all the answers

What is the term used to describe the smallest repeating unit in a crystal lattice?

Unit cell Signup and view all the answers

Which of the following crystal structures is described as having atoms touching each other along the cube diagonals?

Body-centered cubic (BCC) Signup and view all the answers

What is the term used to describe the positions occupied by atoms or particles in a crystal lattice?

Lattice sites Signup and view all the answers

Four Classes of Solids Overview

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Questions and Answers

Which of the following forces hold molecules together in molecular solids?

What is the atomic packing factor (APF) for a simple cubic (SC) crystal structure?

Which crystal structure has the highest atomic packing factor?

What is the stacking sequence of atoms in a hexagonal close-packed (HCP) structure?

Which of the following material classes typically has the highest density?

What is the term used to describe a material that exhibits different crystal structures under different conditions?

Which of the following statements about single crystals is true?

What is the term used to describe the smallest repeating unit in a crystal lattice?

Which of the following crystal structures is described as having atoms touching each other along the cube diagonals?

What is the term used to describe the positions occupied by atoms or particles in a crystal lattice?

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