Question 1

Who discovered the electron?

Accepted Answer

A) Bohr 
B) de Broglie 
C) Rutherford 
D) Heisenberg 
E) Thomson 
A) Bohr 
B) de Broglie 
C) Rutherford 
D) Heisenberg 
E) Thomson E

Question 2

Which of the following represents a pair of isotopes?
Atomic Number
Mass Number

Accepted Answer

A) I 17 34 II 18 34 
B) I 7 14 II 8 14 
C) I 17 35 II 17 37 
D) I 17 37 II 18 38 
E) I 7 15 II 8 16 
A) I 17 34 II 18 34 
B) I 7 14 II 8 14 
C) I 17 35 II 17 37 
D) I 17 37 II 18 38 
E) I 7 15 II 8 16 C

Question 3

The formula for potassium carbonate is

Accepted Answer

A) P2C. 
B) K2CO3. 
C) Po2CO3. 
D) P2CO3. 
E) K2C. 
A) P2C. 
B) K2CO3. 
C) Po2CO3. 
D) P2CO3. 
E) K2C. B

Question 4

Which of the following is an ionic compound?

Accepted Answer

A) HOClO 
B) NH3 
C) CH3OH 
D) N2O3 
E) NH4CN 
A) HOClO 
B) NH3 
C) CH3OH 
D) N2O3 
E) NH4CN

Question 5

Experiments were carried out in which a beam of cathode rays was first bent by a magnetic field and then bent back by an electrostatic field until the beam hit the screen exactly where it had been hitting before the fields were applied.This experiment permitted the direct measurement of

Accepted Answer

A) the ratio of mass to charge of an electron. 
B) the charge on the nucleus of an atom. 
C) the charge on the electron. 
D) the mass of the atom. 
E) the mass of the electron. 
A) the ratio of mass to charge of an electron. 
B) the charge on the nucleus of an atom. 
C) the charge on the electron. 
D) the mass of the atom. 
E) the mass of the electron.

Question 6

Which of the following molecules contains the alcohol functional group?

Accepted Answer

A) C6H6 
B) CH3OH 
C) CH4 
D) CH3OCH3 
E) C2H2 
A) C6H6 
B) CH3OH 
C) CH4 
D) CH3OCH3 
E) C2H2

Question 7

The number of protons in a given nucleus determines the

Accepted Answer

A) mass number. 
B) atomic number. 
C) number of electrons. 
D) number of protons. 
E) number of isotopes. 
A) mass number. 
B) atomic number. 
C) number of electrons. 
D) number of protons. 
E) number of isotopes.

Question 8

Which statement is incorrect concerning the formation of ionic compounds?

Accepted Answer

A) Halogens tend to form anions with a charge of -1. 
B) Alkali metals tend to form cations with a charge of +1. 
C) Metals tend to form cations,while nonmetals tend to form anions. 
D) Transition metals tend to form cations with a charge of +3. 
E) Noble gases tend not to form ionic compounds. 
A) Halogens tend to form anions with a charge of -1. 
B) Alkali metals tend to form cations with a charge of +1. 
C) Metals tend to form cations,while nonmetals tend to form anions. 
D) Transition metals tend to form cations with a charge of +3. 
E) Noble gases tend not to form ionic compounds.

Question 9

A periodic law based on atomic masses would necessitate Te and I changing places in the periodic table.This was not done in the early periodic table because

Accepted Answer

A) a periodic law based on atomic masses is not valid. 
B) it was thought that the atomic masses might be in error. 
C) iodine behaves chemically like chlorine and bromine. 
D) the tellurium samples could contain a heavy impurity. 
E) iodine contains one naturally occurring isotope,whereas tellurium consists of several isotopes. 
A) a periodic law based on atomic masses is not valid. 
B) it was thought that the atomic masses might be in error. 
C) iodine behaves chemically like chlorine and bromine. 
D) the tellurium samples could contain a heavy impurity. 
E) iodine contains one naturally occurring isotope,whereas tellurium consists of several isotopes.

Question 10

The formula of the chlorite ion is

Accepted Answer

A) Cl2O3-. 
B) ClO4-. 
C) Cl-. 
D) ClO2-. 
E) ClO3-. 
A) Cl2O3-. 
B) ClO4-. 
C) Cl-. 
D) ClO2-. 
E) ClO3-.

Question 11

Which of the following molecules contains the carboxylic acid functional group?

Accepted Answer

A) CH3CH2CH2OH 
B) CH3CH2COCH2CH3 
C) CH3NHCH3 
D) CH3OCH2CH3 
E) CH3CH2CH2COOH 
A) CH3CH2CH2OH 
B) CH3CH2COCH2CH3 
C) CH3NHCH3 
D) CH3OCH2CH3 
E) CH3CH2CH2COOH

Question 12

How many electrons does a sulfide ion have?

Accepted Answer

A) 13 
B) 22 
C) 16 
D) 18 
E) 2 
A) 13 
B) 22 
C) 16 
D) 18 
E) 2

Question 13

Which one of the following equations is properly balanced?

Accepted Answer

A) Sn + 4HNO3 → SnO2 + 4NO2 + 2H2O 
B) 2Na2SO4 + 3Bi(NO3)3 → Bi2(SO4)3 + 9NaNO3 
C) CH3CHO + 3O2 → 2CO2 + 2H2O 
D) NH4NO3 → 2H2O + N2 
E) Na2CO3 + 2H2SO4 → Na2SO4 + 2H2O + CO2 
A) Sn + 4HNO3 → SnO2 + 4NO2 + 2H2O 
B) 2Na2SO4 + 3Bi(NO3)3 → Bi2(SO4)3 + 9NaNO3 
C) CH3CHO + 3O2 → 2CO2 + 2H2O 
D) NH4NO3 → 2H2O + N2 
E) Na2CO3 + 2H2SO4 → Na2SO4 + 2H2O + CO2

Question 14

Neon has three naturally occuring isotopes.The abundance of 20Ne is 90.48% and 22Ne is 9.25%.What is the percent abundance of 21Ne?

Accepted Answer

A) 9.25% 
B) 0.27% 
C) 49.9% 
D) 33.2% 
E) 81.2% 
A) 9.25% 
B) 0.27% 
C) 49.9% 
D) 33.2% 
E) 81.2%

Question 15

Which element belongs to the alkali metals?

Accepted Answer

A) rubidium 
B) germanium 
C) barium 
D) iodine 
E) argon 
A) rubidium 
B) germanium 
C) barium 
D) iodine 
E) argon

Question 16

The formula for the sulfide ion is

Accepted Answer

A) SO32-. 
B) SO42-. 
C) S2O32-. 
D) S2-. 
E) HSO4-. 
A) SO32-. 
B) SO42-. 
C) S2O32-. 
D) S2-. 
E) HSO4-.

Question 17

Which of the following statements about different elements is incorrect?

Accepted Answer

A) Potassium is an alkali metal. 
B) Fluorine is a halogen. 
C) Aluminum is a transition element. 
D) Barium is an alkaline earth metal. 
E) Helium is a noble gas. 
A) Potassium is an alkali metal. 
B) Fluorine is a halogen. 
C) Aluminum is a transition element. 
D) Barium is an alkaline earth metal. 
E) Helium is a noble gas.

Question 18

Choose the group containing the most reactive nonmetals.

Accepted Answer

A) Group 5A 
B) Group 3A 
C) Group 7A 
D) Group 8A 
E) Group 1A 
A) Group 5A 
B) Group 3A 
C) Group 7A 
D) Group 8A 
E) Group 1A

Question 19

An element,X,has the following isotopic composition: X-200,90%; X-199,8.0%; and X-202,2.0%.Its average atomic mass is closest to

Accepted Answer

A) 200 amu. 
B) 203 amu. 
C) 199 amu. 
D) 202 amu. 
E) 201 amu. 
A) 200 amu. 
B) 203 amu. 
C) 199 amu. 
D) 202 amu. 
E) 201 amu.

Question 20

The empirical formula of a salt consisting of Ba2+ and OH- ions is

Accepted Answer

A) Ba2+OH-. 
B) BaOH. 
C) Ba2OH. 
D) Ba2(OH)3. 
E) Ba(OH)2. 
A) Ba2+OH-. 
B) BaOH. 
C) Ba2OH. 
D) Ba2(OH)3. 
E) Ba(OH)2.

Exam 2: Atoms, molecules, and Ions

Who discovered the electron?

Which of the following represents a pair of isotopes? Atomic Number Mass Number

The formula for potassium carbonate is

Which of the following is an ionic compound?

Experiments were carried out in which a beam of cathode rays was first bent by a magnetic field and then bent back by an electrostatic field until the beam hit the screen exactly where it had been hitting before the fields were applied.This experiment permitted the direct measurement of

Which of the following molecules contains the alcohol functional group?

The number of protons in a given nucleus determines the

Which statement is incorrect concerning the formation of ionic compounds?

A periodic law based on atomic masses would necessitate Te and I changing places in the periodic table.This was not done in the early periodic table because

The formula of the chlorite ion is

Which of the following molecules contains the carboxylic acid functional group?

How many electrons does a sulfide ion have?

Which one of the following equations is properly balanced?

Neon has three naturally occuring isotopes.The abundance of 20Ne is 90.48% and 22Ne is 9.25%.What is the percent abundance of 21Ne?

Which element belongs to the alkali metals?

The formula for the sulfide ion is

Which of the following statements about different elements is incorrect?

Choose the group containing the most reactive nonmetals.

An element,X,has the following isotopic composition: X-200,90%; X-199,8.0%; and X-202,2.0%.Its average atomic mass is closest to

The empirical formula of a salt consisting of Ba2+ and OH- ions is

Chemistry and Measurement

Calculations With Chemical Formulas and Equations

Chemical Reactions

The Gaseous State

Thermochemistry

Quantum Theory of the Atom

Electron Configurations and Periodicity

Ionic and Covalent Bonding

Molecular Geometry and Chemical Bonding Theory

States of Matter; Liquids and Solids

Solutions

Rates of Reaction

Chemical Equilibrium

Acids and Bases

Acid-Base Equilibria

Solubility and Complex-Ion Equilibria

Thermodynamics and Equilibrium

Electrochemistry

Nuclear Chemistry

Chemistry of the Main-Group Metals

The Transition Elements and Coordination Compounds

Organic Chemistry

Polymer Materials: Synthetic and Biological

Filters

Neon has three naturally occuring isotopes.The abundance of ²⁰Ne is 90.48% and ²²Ne is 9.25%.What is the percent abundance of ²¹Ne?

The empirical formula of a salt consisting of Ba²⁺ and OH^- ions is