Solid State Physics (1) , Phys3710 Dr Mazen Alshaaer

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Solid State Physics (1) , Phys3710

Dr Mazen Alshaaer

Q1: Determine whether each of the following statements is false (F) or correct (C)?

1.

Real Crystals always have foreign atoms (impurities), missing atoms (vacancies), & atoms in between lattice sites (interstitials) ( )

2.

Liquids require more energy to break the interatomic bonds than solids. ( )

3.

Solids, liquids, and gasses are called condensed matter. ( )

4.

Primitive unit cell should include only one atom. ( )

5.

Simple cubic (SC) structure is considered as primitive unit cell. ( )

Q2: In the following multiple-choice questions, please circle the correct answer:

1.

The following Figure shows the 3D arrangement of atoms in a material, this material is: a.

Amorphous b.

Crystalline c.

Polycrystalline

2.

The ionic bond is a dominant bond in the following class of Materials: a.

Polymers b.

Metals c.

Semiconductors d.

Ceramics

3.

Which of the following is not representing a unit cell: a.

a b.

b c.

c d.

d

4.

The following Bravais lattice in 2D is called: a.

Centered rectangular b.

Rectangular c.

General or Oblique d.

Hexagonal

5.

The number of atoms per unit cell of BCC (Body Centered Cube) lattice is?

1

a.

1 b.

2 c.

4 d.

8

6.

Which of the following figures represents S orbital?

7.

The following diagram represents the potential energy curve of two materials. Based on this diagram which of the following is false sentence? a.

Material 2 exhibits lower E Modulus than Material 1. b.

Material 2 exhibits lower melting temperature than Material 1. c.

Material 2 exhibits lower thermal expansion coefficient than

Material 1.

8.

The following figure represents the unit cell in 3D of: a.

Simple cube structure b.

Body centered cube structure c.

Face centered cube structure

9.

Which is the most ionic bond of the following compounds (See the periodic table below): a.

NaCl b.

KCl c.

CsCl d.

H

2

10.

Which is the most covalent bond of the following compounds (See the periodic table

below): a.

HCl b.

CaCl

2 c.

SrCl

2 d.

LiCl

2

Q3: If the following figure represents a 2 dimensional (2D) lattice crystal, answer the following questions :

1.

Draw 2 possible primitive unit cells.

2.

Draw other 2 possible conventional unit cells.

3.

Show 2 possible primitive lattice vectors.

 Q4: Here is the energy diagram against the interatomic separation between two atoms.

Where on the x-axis, the Cl atom have the most stable position regarding to the positive

Na atom on point zero?

3

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