Question 1

How many electrons are in the ion,CO32-?

Accepted Answer

A) 16 
B) 28 
C) 30 
D) 32 
A) 16 
B) 28 
C) 30 
D) 32

Question 2

Which element is most chemically similar to the element indicated by the letter E in the following periodic table?

Accepted Answer

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

Question 3

-Which of the above drawings represents a mixture?

Accepted Answer

A) drawing (a) 
B) drawing (b) 
C) drawing (c) 
A) drawing (a) 
B) drawing (b) 
C) drawing (c)

Question 4

Identify a chemical property.

Accepted Answer

A) tarnishing 
B) boiling point 
C) taste 
D) solubility 
A) tarnishing 
B) boiling point 
C) taste 
D) solubility

Question 5

A sample of pure lithium chloride contains 16% lithium by mass.What is the % lithium by mass in a sample of pure lithium carbonate that has twice the mass of the first sample?

Accepted Answer

A) 8.20% 
B) 16.4% 
C) 32.8% 
D) 65.6% 
A) 8.20% 
B) 16.4% 
C) 32.8% 
D) 65.6%

Question 6

The current model of the atom in which essentially all of an atom's mass is contained in a very small nucleus,whereas most of an atom's volume is due to the space in which the atom's electrons move was established by

Accepted Answer

A) Millikan's oil drop experiment. 
B) Rutherford's gold foil experiment. 
C) Thomson's cathode ray tube experiment. 
D) None of these 
A) Millikan's oil drop experiment. 
B) Rutherford's gold foil experiment. 
C) Thomson's cathode ray tube experiment. 
D) None of these

Question 7

The element that is in period 5 and group 2A has the symbol ________.

Accepted Answer

The answer of The element that is in period 5...

Question 8

All of the following elements are nonmetals except

Accepted Answer

A) copper. 
B) nitrogen. 
C) krypton. 
D) phosphorus. 
A) copper. 
B) nitrogen. 
C) krypton. 
D) phosphorus.

Question 9

Which element has the chemical symbol,Au?

Accepted Answer

A) antimony 
B) americium 
C) gold 
D) lead 
A) antimony 
B) americium 
C) gold 
D) lead

Question 10

Which one of the following elements is a poor conductor of heat and electricity?

Accepted Answer

A) nickel 
B) sulfur 
C) aluminum 
D) lead 
A) nickel 
B) sulfur 
C) aluminum 
D) lead

Question 11

Which of the following is not explained by Dalton's atomic theory?

Accepted Answer

A) conservation of mass during a chemical reaction 
B) the existence of more than one isotope of an element 
C) the law of definite proportions 
D) the law of multiple proportions 
A) conservation of mass during a chemical reaction 
B) the existence of more than one isotope of an element 
C) the law of definite proportions 
D) the law of multiple proportions

Question 12

The ion NO2- is named

Accepted Answer

A) nitrate ion. 
B) nitrite ion. 
C) nitrogen dioxide ion. 
D) nitrogen(II)oxide ion. 
A) nitrate ion. 
B) nitrite ion. 
C) nitrogen dioxide ion. 
D) nitrogen(II)oxide ion.

Question 13

Which of the compounds,C5H12,CaF2,Pd(NO3)2,OCl2,are expected to exist as molecules?

Accepted Answer

A) only C5H12 
B) C5H12 and OCl2 
C) C5H12,Pd(NO3)2,and OCl2 
D) CaF2 and Pd(NO3)2 
A) only C5H12 
B) C5H12 and OCl2 
C) C5H12,Pd(NO3)2,and OCl2 
D) CaF2 and Pd(NO3)2

Question 14

The smallest sample of carbon atoms that can be observed with the naked eye has a mass of approximately 2 × 10-8 g.Given that 1 g = 6.02 × 1023 amu,and that carbon has an atomic weight of 12.01 amu,determine the number of carbon atoms present in the sample.

Accepted Answer

A) 1 × 1015 
B) 1 × 1016 
C) 1 × 1017 
D) 6 × 1023 
A) 1 × 1015 
B) 1 × 1016 
C) 1 × 1017 
D) 6 × 1023

Question 15

The observation that hydrogen and oxygen can react to form two compounds with different chemical and physical properties,one having an O:H mass ratio = 8:1 and the other having an O:H mass ratio = 16:1 is consistent with the law of

Accepted Answer

A) definite proportions. 
B) energy conservation. 
C) mass conservation. 
D) multiple proportions. 
A) definite proportions. 
B) energy conservation. 
C) mass conservation. 
D) multiple proportions.

Question 16

Mg can react with HCl to produce the white solid MgCl2 and H2 gas.A student mixes 1.99 g of Mg with 5.98 g of HCl.If the mass of the white solid is 7.79 g,then what is the mass of H2 produced?

Accepted Answer

A) 0.0 g 
B) 0.18 g 
C) 2.0 g 
D) 15.76 g 
A) 0.0 g 
B) 0.18 g 
C) 2.0 g 
D) 15.76 g

Question 17

Which of the following figures represents   H? Unshaded spheres represent neutrons and shaded spheres represent protons.

Accepted Answer

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

Question 18

What are the names of the ions Mn2+,Sn2+,and Se2-?

Accepted Answer

A) manganese,tin,and selenium 
B) manganese,tin(II),and selenide 
C) manganese(II),tin(II),and selenium(II-) 
D) manganous,stannous,and selenide 
A) manganese,tin,and selenium 
B) manganese,tin(II),and selenide 
C) manganese(II),tin(II),and selenium(II-) 
D) manganous,stannous,and selenide

Question 19

What is the name of the compound formed between Ca and N?

Accepted Answer

A) calcium dinitride 
B) calcium trinitride 
C) monocalcium trinitride 
D) calcium nitride 
A) calcium dinitride 
B) calcium trinitride 
C) monocalcium trinitride 
D) calcium nitride

Question 20

Which of the following figures represents   N? Unshaded spheres represent neutrons and shaded spheres represent protons.

Accepted Answer

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

Exam 2: Atoms, molecules, and Ions

How many electrons are in the ion,CO32-?

Which element is most chemically similar to the element indicated by the letter E in the following periodic table?

-Which of the above drawings represents a mixture?

Identify a chemical property.

A sample of pure lithium chloride contains 16% lithium by mass.What is the % lithium by mass in a sample of pure lithium carbonate that has twice the mass of the first sample?

The current model of the atom in which essentially all of an atom's mass is contained in a very small nucleus,whereas most of an atom's volume is due to the space in which the atom's electrons move was established by

The element that is in period 5 and group 2A has the symbol ________.

All of the following elements are nonmetals except

Which element has the chemical symbol,Au?

Which one of the following elements is a poor conductor of heat and electricity?

Which of the following is not explained by Dalton's atomic theory?

The ion NO2- is named

Which of the compounds,C5H12,CaF2,Pd(NO3)2,OCl2,are expected to exist as molecules?

The smallest sample of carbon atoms that can be observed with the naked eye has a mass of approximately 2 × 10-8 g.Given that 1 g = 6.02 × 1023 amu,and that carbon has an atomic weight of 12.01 amu,determine the number of carbon atoms present in the sample.

The observation that hydrogen and oxygen can react to form two compounds with different chemical and physical properties,one having an O:H mass ratio = 8:1 and the other having an O:H mass ratio = 16:1 is consistent with the law of

Mg can react with HCl to produce the white solid MgCl2 and H2 gas.A student mixes 1.99 g of Mg with 5.98 g of HCl.If the mass of the white solid is 7.79 g,then what is the mass of H2 produced?

Which of the following figures represents H? Unshaded spheres represent neutrons and shaded spheres represent protons.

What are the names of the ions Mn2+,Sn2+,and Se2-?

What is the name of the compound formed between Ca and N?

Which of the following figures represents N? Unshaded spheres represent neutrons and shaded spheres represent protons.

Chemical Tools: Experimentation and Measurement

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

Metals and Solid-State Materials

The Main-Group Elements

Connections to Organic and Biological Chemistry

Filters

How many electrons are in the ion,CO₃^2-?

The ion NO₂^- is named

Which of the compounds,C₅H₁₂,CaF₂,Pd(NO₃)₂,OCl₂,are expected to exist as molecules?

The smallest sample of carbon atoms that can be observed with the naked eye has a mass of approximately 2 × 10^-8 g.Given that 1 g = 6.02 × 10²³ amu,and that carbon has an atomic weight of 12.01 amu,determine the number of carbon atoms present in the sample.

Mg can react with HCl to produce the white solid MgCl₂ and H₂ gas.A student mixes 1.99 g of Mg with 5.98 g of HCl.If the mass of the white solid is 7.79 g,then what is the mass of H₂ produced?

What are the names of the ions Mn²⁺,Sn²⁺,and Se^2-?

Which of the following figures represents N_? Unshaded spheres represent neutrons and shaded spheres represent protons.