Question 1

Which substance is the best conductor of electricity?

Accepted Answer

A) bromine 
B) diamond 
C) tungsten 
D) xenon 
A) bromine 
B) diamond 
C) tungsten 
D) xenon

Question 2

According to band theory,which of the following metals is expected to have the strongest bonding and highest melting point?

Accepted Answer

A) Cs 
B) Cu 
C) Rb 
D) Ru 
A) Cs 
B) Cu 
C) Rb 
D) Ru

Question 3

Look at the location of elements A,B,C,and D in the following periodic table.  
-Which of these elements is likely to be extracted from its ore by electrolysis?

Accepted Answer

A) element A 
B) element B 
C) element C 
D) element D 
A) element A 
B) element B 
C) element C 
D) element D

Question 4

The number of electrons that half fill a composite s-d band is ________.

Accepted Answer

The answer of The number of electrons that half fill...

Question 5

Use the picture below to answer the following questions.  
-Which diagram describes the molecular orbital picture for the species Na6?

Accepted Answer

A) diagram (4) 
B) diagram (5) 
C) diagram (6) 
D) diagram (7) 
A) diagram (4) 
B) diagram (5) 
C) diagram (6) 
D) diagram (7)

Question 6

How would one classify a silicon crystal doped with indium?

Accepted Answer

A) conductor 
B) n-type semiconductor 
C) p-type semiconductor 
D) insulator 
A) conductor 
B) n-type semiconductor 
C) p-type semiconductor 
D) insulator

Question 7

Which has been found to be a three dimensional superconductor that conducts equally in all directions?

Accepted Answer

A) C (diamond) 
B) C (graphite) 
C) K3C60 
D) YBa2Cu3O7 
A) C (diamond) 
B) C (graphite) 
C) K3C60 
D) YBa2Cu3O7

Question 8

Copper can be obtained from its copper(I)sulfide ore by roasting.What is the balanced equation for the roasting of copper(I)sulfide?

Accepted Answer

Cu₂S(s)+ O₂(

Question 9

How is slag separated from molten ore in a blast furnace?

Accepted Answer

A) chemical treatment 
B) density differences 
C) distillation 
D) magnetic differences 
A) chemical treatment 
B) density differences 
C) distillation 
D) magnetic differences

Question 10

Light emitting diodes (LEDs)used in automobile brake lights illuminate 200 milliseconds faster than conventional incandescent brake lights.The faster illumination gives the driver of a trailing car an additional stopping distance of ________ feet at 55 mph.

Accepted Answer

The answer of Light emitting diodes (LEDs)used in automobile brake...

Question 11

When zinc sulfide undergoes roasting,the products are

Accepted Answer

A) Zn and S. 
B) Zn and H2S. 
C) ZnO and S. 
D) ZnO and SO2. 
A) Zn and S. 
B) Zn and H2S. 
C) ZnO and S. 
D) ZnO and SO2.

Question 12

Al2O3 can be separated from iron oxide impurities in bauxite by dissolving the Al2O3 in hot aqueous NaOH.Give the formula of the aluminum complex ion that forms,and write a balanced net ionic equation for its formation by the reaction between Al2O3 and NaOH.

Accepted Answer

Al(OH)₄^-,Al₂O

Question 13

Which one of the following is an n-type of semiconductor?

Accepted Answer

A) alumina 
B) germanium doped with antimony 
C) germanium doped with boron 
D) tellurium 
A) alumina 
B) germanium doped with antimony 
C) germanium doped with boron 
D) tellurium

Question 14

The principal source of chromium is chromite.What is the formula of chromite?

Accepted Answer

The answer of The principal source of chromium is chromite.What...

Question 15

How many kilograms of copper sulfide must be reduced to produce 3.20 × 1010 kg of Cu? The reduction of copper proceeds via the following reaction. Cu2S (l)+ O2 (g)2Cu (l)+ SO2 (g)

Accepted Answer

A) 3.20 × 1013 kg 
B) 4.0 × 1012 kg 
C) 6.4 × 1010 kg 
D) 1.3 × 1011 kg 
A) 3.20 × 1013 kg 
B) 4.0 × 1012 kg 
C) 6.4 × 1010 kg 
D) 1.3 × 1011 kg

Question 16

According to band theory,which one of the following metals is expected to have the highest melting point?

Accepted Answer

A) Cd 
B) Cr 
C) Hg 
D) Zn 
A) Cd 
B) Cr 
C) Hg 
D) Zn

Question 17

The balanced chemical equation for the production of silver by roasting of its sulfide is ________.

Accepted Answer

Ag₂S(s)+ O₂(

Question 18

White tin has an electrical conductivity that decreases with increasing temperature,and gray tin has an electrical conductivity that increases with increasing temperature.Therefore,white tin is classified as a(n)________,and gray tin is classified as a(n)________.

Accepted Answer

A) insulator,metal 
B) metal,insulator 
C) metal,semiconductor 
D) semiconductor,metal 
A) insulator,metal 
B) metal,insulator 
C) metal,semiconductor 
D) semiconductor,metal

Question 19

Composite materials can be classified as ceramic-ceramic,ceramic-metal,or ceramic-polymer.Silicon carbide-reinforced alumina is classified as ________.

Accepted Answer

The answer of Composite materials can be classified as ceramic-ceramic,ceramic-metal,or...

Question 20

The following pictures show the electron populations of the composite s-d bands for Sc,Ti,V,and Zn.  
-Which picture corresponds to Zn?

Accepted Answer

A) picture (1) 
B) picture (2) 
C) picture (3) 
D) picture (4) 
A) picture (1) 
B) picture (2) 
C) picture (3) 
D) picture (4)

Exam 21: Metals and Solid-State Materials

Which substance is the best conductor of electricity?

According to band theory,which of the following metals is expected to have the strongest bonding and highest melting point?

Look at the location of elements A,B,C,and D in the following periodic table. -Which of these elements is likely to be extracted from its ore by electrolysis?

The number of electrons that half fill a composite s-d band is ________.

Use the picture below to answer the following questions. -Which diagram describes the molecular orbital picture for the species Na6?

How would one classify a silicon crystal doped with indium?

Which has been found to be a three dimensional superconductor that conducts equally in all directions?

Copper can be obtained from its copper(I)sulfide ore by roasting.What is the balanced equation for the roasting of copper(I)sulfide?

How is slag separated from molten ore in a blast furnace?

Light emitting diodes (LEDs)used in automobile brake lights illuminate 200 milliseconds faster than conventional incandescent brake lights.The faster illumination gives the driver of a trailing car an additional stopping distance of ________ feet at 55 mph.

When zinc sulfide undergoes roasting,the products are

Al2O3 can be separated from iron oxide impurities in bauxite by dissolving the Al2O3 in hot aqueous NaOH.Give the formula of the aluminum complex ion that forms,and write a balanced net ionic equation for its formation by the reaction between Al2O3 and NaOH.

Which one of the following is an n-type of semiconductor?

The principal source of chromium is chromite.What is the formula of chromite?

How many kilograms of copper sulfide must be reduced to produce 3.20 × 1010 kg of Cu? The reduction of copper proceeds via the following reaction. Cu2S (l)+ O2 (g)2Cu (l)+ SO2 (g)

According to band theory,which one of the following metals is expected to have the highest melting point?

The balanced chemical equation for the production of silver by roasting of its sulfide is ________.

White tin has an electrical conductivity that decreases with increasing temperature,and gray tin has an electrical conductivity that increases with increasing temperature.Therefore,white tin is classified as a(n)________,and gray tin is classified as a(n)________.

Composite materials can be classified as ceramic-ceramic,ceramic-metal,or ceramic-polymer.Silicon carbide-reinforced alumina is classified as ________.

The following pictures show the electron populations of the composite s-d bands for Sc,Ti,V,and Zn. -Which picture corresponds to Zn?

Chemical Tools: Experimentation and Measurement

Atoms, molecules, and Ions

Mass Relationships in Chemical Reactions

Reactions in Aqueous Solutions

Periodicity and the Electronic Structure of Atoms

Ionic Compounds: Periodic Trends and Bonding

Covalent Bonding and Electron-Dot Structures

Covalent Compounds: Bonding Theories and Molecular Structure

Thermochemistry: Chemical Energy

Gases: Their Properties and Behavior

Liquids, solids, and Phase Changes

Solutions and Their Properties

Chemical Kinetics

Chemical Equilibrium

Aqueous Equilibria: Acids and Bases

Applications of Aqueous Equilibria

Thermodynamics: Entropy, free Energy, and Equilibrium

Electrochemistry

Nuclear Chemistry

Transition Elements and Coordination Chemistry

The Main-Group Elements

Connections to Organic and Biological Chemistry

Filters

Use the picture below to answer the following questions. -Which diagram describes the molecular orbital picture for the species Na₆?

Al₂O₃ can be separated from iron oxide impurities in bauxite by dissolving the Al₂O₃ in hot aqueous NaOH.Give the formula of the aluminum complex ion that forms,and write a balanced net ionic equation for its formation by the reaction between Al₂O₃ and NaOH.

How many kilograms of copper sulfide must be reduced to produce 3.20 × 10¹⁰ kg of Cu? The reduction of copper proceeds via the following reaction. Cu₂S (l)+ O₂ (g)2Cu (l)+ SO₂ (g)

White tin has an electrical conductivity that decreases with increasing temperature,and gray tin has an electrical conductivity that increases with increasing temperature.Therefore,white tin is classified as a(n),and gray tin is classified as a(n).