Question 1

Elements in Group 8A are known as the _ _.

Accepted Answer

A)  chalcogens 
B)  noble gases 
C)  alkali metals 
D)  alkaline earth metals 
E)  halogens 
A)  chalcogens 
B)  noble gases 
C)  alkali metals 
D)  alkaline earth metals 
E)  halogens

Question 2

An atom of 131I contains _Electrons.

Accepted Answer

A)  184 
B)  78 
C)  53 
D)  131 
E)  124 
A)  184 
B)  78 
C)  53 
D)  131 
E)  124

Question 3

Magnesium reacts with a certain element to form a compound with the general formula MgX. What would the most likely formula be for the compound formed between potassium and element X?

Accepted Answer

A)  K2X2  
B)  K2X3  
C)  KX2  
D)  KX 
E)  K2X 
A)  K2X2  
B)  K2X3  
C)  KX2  
D)  KX 
E)  K2X

Question 4

The empirical formula of a compound with molecules containing 12 carbon atoms, 14 hydrogen atoms, and 6 oxygen atoms is .

Accepted Answer

A)  CHO 
B)  C6H7O3 
C)  CH2O 
D)  C2H4O 
E)  C12H14O6 
A)  CHO 
B)  C6H7O3 
C)  CH2O 
D)  C2H4O 
E)  C12H14O6

Question 5

In the absence of magnetic or electric fields, cathode rays .

Accepted Answer

A)  travel in straight lines 
B)  do not exist 
C)  cannot be detected 
D)  bend toward a light source 
E)  become positively charged 
A)  travel in straight lines 
B)  do not exist 
C)  cannot be detected 
D)  bend toward a light source 
E)  become positively charged

Question 6

How many electrons does the Al3+ ion possess?

Accepted Answer

A)  10 
B)  0 
C)  16 
D)  13 
E)  6 
A)  10 
B)  0 
C)  16 
D)  13 
E)  6

Question 7

Elements in the same group of the periodic table typically have .

Accepted Answer

A)  similar chemical properties only 
B)  similar physical and chemical properties 
C)  similar physical properties only 
D)  similar mass numbers 
E)  similar atomic masses 
A)  similar chemical properties only 
B)  similar physical and chemical properties 
C)  similar physical properties only 
D)  similar mass numbers 
E)  similar atomic masses

Question 8

Which species has 48 electrons?

Accepted Answer

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

Question 9

The correct formula for molybdenum(IV) hypochlorite is .

Accepted Answer

A)  Mo(ClO2)4 
B)  Mo(ClO3)4 
C)  Mo(ClO4)4 
D)  MoCl4 
E)  Mo(ClO)4 
A)  Mo(ClO2)4 
B)  Mo(ClO3)4 
C)  Mo(ClO4)4 
D)  MoCl4 
E)  Mo(ClO)4

Question 10

Which group in the periodic table contains only nonmetals?

Accepted Answer

A)  1A 
B)  2A 
C)  2B 
D)  6A 
E)  8A 
A)  1A 
B)  2A 
C)  2B 
D)  6A 
E)  8A

Question 11

Which one of the following does not occur as diatomic molecules in elemental form?

Accepted Answer

A)  sulfur 
B)  oxygen 
C)  nitrogen 
D)  hydrogen 
E)  bromine 
A)  sulfur 
B)  oxygen 
C)  nitrogen 
D)  hydrogen 
E)  bromine

Question 12

The average atomic weight of copper, which has two naturally occurring isotopes, is 63.5. One of the isotopes has an atomic weight of 62.9 amu and constitutes 69.1% of the copper isotopes. The other isotope has an abundance of 30.9%. The atomic weight (amu) of the second isotope is
Amu)

Accepted Answer

A)  63.2 
B)  64.8 
C)  64.1 
D)  63.8 
E)  28.1 
A)  63.2 
B)  64.8 
C)  64.1 
D)  63.8 
E)  28.1

Question 13

Which of the following compounds would you expect to be ionic?

Accepted Answer

A)  H2O2  
B)  CaO 
C)  NH3  
D)  SF6  
E)  H2O 
A)  H2O2  
B)  CaO 
C)  NH3  
D)  SF6  
E)  H2O

Question 14

Which type of formula provides the most information about a compound?

Accepted Answer

A)  simplest 
B)  empirical 
C)  chemical 
D)  molecular 
E)  structural 
A)  simplest 
B)  empirical 
C)  chemical 
D)  molecular 
E)  structural

Question 15

Which species below is the nitride ion?

Accepted Answer

A)  N 3-  
B)  Na+  
C)  NH4+  
D)  NO2-  
E)  NO3- 
A)  N 3-  
B)  Na+  
C)  NH4+  
D)  NO2-  
E)  NO3-

Question 16

The element X has three naturally occurring isotopes. The isotopic masses (amu) and % abundances of the isotopes are given in the table below. The average atomic mass of the element is (Amu)

Accepted Answer

A)  57.23 
B)  56.11 
C)  33.33 
D)  56.29 
E)  55.74 
A)  57.23 
B)  56.11 
C)  33.33 
D)  56.29 
E)  55.74

Question 17

The correct name for CaH2 is _ .

Accepted Answer

A)  hydrocalcium 
B)  calcium dihydroxide 
C)  calcium dihydride 
D)  calcium hydride 
E)  calcium hydroxide 
A)  hydrocalcium 
B)  calcium dihydroxide 
C)  calcium dihydride 
D)  calcium hydride 
E)  calcium hydroxide

Question 18

Which formula/name pair is incorrect?

Accepted Answer

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

Question 19

Which pair of elements would you expect to exhibit the greatest similarity in their physical and chemical properties?

Accepted Answer

A)  Cs, Ba 
B)  C, O 
C)  Ca, Sr 
D)  Ga, Ge 
E)  H, Li 
A)  Cs, Ba 
B)  C, O 
C)  Ca, Sr 
D)  Ga, Ge 
E)  H, Li

Question 20

_- rays consist of fast- moving electrons.

Accepted Answer

A)  gamma 
B)  beta 
C)  X 
D)  alpha 
E)  none of the above 
A)  gamma 
B)  beta 
C)  X 
D)  alpha 
E)  none of the above

Exam 2: Atoms, Molecules, and Ions

Elements in Group 8A are known as the _ _.

An atom of 131I contains _Electrons.

Magnesium reacts with a certain element to form a compound with the general formula MgX. What would the most likely formula be for the compound formed between potassium and element X?

The empirical formula of a compound with molecules containing 12 carbon atoms, 14 hydrogen atoms, and 6 oxygen atoms is .

In the absence of magnetic or electric fields, cathode rays .

How many electrons does the Al3+ ion possess?

Elements in the same group of the periodic table typically have .

Which species has 48 electrons?

The correct formula for molybdenum(IV) hypochlorite is .

Which group in the periodic table contains only nonmetals?

Which one of the following does not occur as diatomic molecules in elemental form?

The average atomic weight of copper, which has two naturally occurring isotopes, is 63.5. One of the isotopes has an atomic weight of 62.9 amu and constitutes 69.1% of the copper isotopes. The other isotope has an abundance of 30.9%. The atomic weight (amu) of the second isotope is Amu)

Which of the following compounds would you expect to be ionic?

Which type of formula provides the most information about a compound?

Which species below is the nitride ion?

The element X has three naturally occurring isotopes. The isotopic masses (amu) and % abundances of the isotopes are given in the table below. The average atomic mass of the element is (Amu)

The correct name for CaH2 is _ .

Which formula/name pair is incorrect?

Which pair of elements would you expect to exhibit the greatest similarity in their physical and chemical properties?

_- rays consist of fast- moving electrons.

Introduction: Matter and Measurement

Stoichiometry: Calculations With Chemical Formulas and Equations

Aqueous Reactions and Solution Stoichiometry

Electronic Structure of Atoms

Periodic Properties of the Elements

Basic Concepts of Chemical Bonding

Gases

Intermolecular Forces, Liquids, and Solids

Modern Materials

Properties of Solutions

Chemical Kinetics

Chemical Equilibrium

Acid-Base Equilibria

Additional Aspects of Equilibria

Chemistry of the Environment

Chemical Thermodynamics

Electrochemistry

Nuclear Chemistry

Chemistry of the Nonmetals

Metals and Metallurgy

Chemistry of Coordination Compounds

The Chemistry of Life: Organic and Biological Chemistry

Filters

An atom of ¹³¹I contains _Electrons.

How many electrons does the Al³⁺ion possess?

The correct name for CaH₂is _ .