Question 1

Choose the appropriate number of atoms contained in a formula unit of iron(II) hydroxide.

Accepted Answer

A)  two atoms per formula unit 
B)  three atoms per formula unit 
C)  four atoms per formula unit 
D)  five or more atoms per formula unit 
A)  two atoms per formula unit 
B)  three atoms per formula unit 
C)  four atoms per formula unit 
D)  five or more atoms per formula unit D

Question 2

The "octet rule" relates to the number eight because:

Accepted Answer

A)  Only atoms with eight valence electrons undergo chemical reaction. 
B)  Ions with charges of +8 and -8 are very stable. 
C)  Atoms, during compound formation, frequently obtain eight valence electrons. 
D)  All electron subshells can hold eight electrons. 
A)  Only atoms with eight valence electrons undergo chemical reaction. 
B)  Ions with charges of +8 and -8 are very stable. 
C)  Atoms, during compound formation, frequently obtain eight valence electrons. 
D)  All electron subshells can hold eight electrons. C

Question 3

Choose a formula from the response list with +1 charged monoatomic ions present.

Accepted Answer

A)  K3N 
B)  AlF3 
C)  CaSO4 
D)  (NH4)2S 
A)  K3N 
B)  AlF3 
C)  CaSO4 
D)  (NH4)2S A

Question 4

The mechanism for ionic bond formation always involves the transferring of

Accepted Answer

A)  electrons from nonmetallic atoms to metallic atoms 
B)  protons from the nucleus of metallic atoms to the nucleus of nonmetallic atoms 
C)  sufficient electrons to produce ions of equal but opposite charge 
D)  more than one correct response 
E)  no correct response 
A)  electrons from nonmetallic atoms to metallic atoms 
B)  protons from the nucleus of metallic atoms to the nucleus of nonmetallic atoms 
C)  sufficient electrons to produce ions of equal but opposite charge 
D)  more than one correct response 
E)  no correct response

Question 5

Characterize EACH of the three given statements as being TRUE or FALSE and then indicate the collective true-false status of the statements using the choices: (1) Ionic bonds result from the sharing of one or more pairs of electrons.
(2) The compound copper(II) phosphate contains eight oxygen atoms per formula unit.
(3) Ionic compounds that contain fixed charge metals cannot contain polyatomic ions.

Accepted Answer

A)  All three statements are true. 
B)  Two of the three statements are true. 
C)  Only one of the statements is true. 
D)  None of the statements is true. 
A)  All three statements are true. 
B)  Two of the three statements are true. 
C)  Only one of the statements is true. 
D)  None of the statements is true.

Question 6

Choose a formula from the response list with where the positive and negative ions present carry the same amount of charge.

Accepted Answer

A)  K3N 
B)  AlF3 
C)  CaSO4 
D)  (NH4)2S 
A)  K3N 
B)  AlF3 
C)  CaSO4 
D)  (NH4)2S

Question 7

In which of the following pairs of ionic compounds do both members of the pair contain +1 ions?

Accepted Answer

A)  KCl and CaO 
B)  Na3N and Li2S 
C)  AlCl3 and MgF2 
D)  more than one correct response 
E)  no correct response 
A)  KCl and CaO 
B)  Na3N and Li2S 
C)  AlCl3 and MgF2 
D)  more than one correct response 
E)  no correct response

Question 8

Elements in groups IIA and VIIA of the periodic table would, respectively, be expected to form ions with charges of

Accepted Answer

A)  +2 and +7 
B)  -2 and -7 
C)  +2 and +1 
D)  +2 and -1 
A)  +2 and +7 
B)  -2 and -7 
C)  +2 and +1 
D)  +2 and -1

Question 9

For the ion or element combinations of M3+ and X2-, choose the correct formula for the compound produced.

Accepted Answer

A)  MX 
B)  M2X 
C)  MX2 
D)  M2X3 
A)  MX 
B)  M2X 
C)  MX2 
D)  M2X3

Question 10

Which one of the following compounds has a formula that contains parentheses?

Accepted Answer

A)  barium carbonate 
B)  lithium hydroxide 
C)  strontium hydroxide 
D)  ammonium hydroxide 
A)  barium carbonate 
B)  lithium hydroxide 
C)  strontium hydroxide 
D)  ammonium hydroxide

Question 11

For the electron configuration 1s22s22p63s23p64s23d104p3, choose the appropriate number of valence electrons present from the response list.

Accepted Answer

A)  1 valence electron 
B)  3 valence electrons 
C)  5 valence electrons 
D)  7 valence electrons 
A)  1 valence electron 
B)  3 valence electrons 
C)  5 valence electrons 
D)  7 valence electrons

Question 12

In which of the following compounds is there a one-to-two ratio between positive and negative ions?

Accepted Answer

A)  calcium sulfide 
B)  magnesium bromide 
C)  lead(IV) oxide 
D)  more than one correct response 
E)  no correct response 
A)  calcium sulfide 
B)  magnesium bromide 
C)  lead(IV) oxide 
D)  more than one correct response 
E)  no correct response

Question 13

Characterize EACH of the three given statements as being TRUE or FALSE and then indicate the collective true-false status of the statements using the choices: (1) An atom with the electron configuration 1s22s22p2 possesses two valence electrons.
(2) The formula of the ionic compounds that contains Ba2+ and N3- ions is Ba2N3.
(3) The polyatomic ions nitrate and azide are both tetraatomic entities.

Accepted Answer

A)  All three statements are true. 
B)  Two of the three statements are true. 
C)  Only one of the statements is true. 
D)  None of the statements is true. 
A)  All three statements are true. 
B)  Two of the three statements are true. 
C)  Only one of the statements is true. 
D)  None of the statements is true.

Question 14

Choose a formula from the response list with -2 charged monoatomic ions present.

Accepted Answer

A)  K3N 
B)  AlF3 
C)  CaSO4 
D)  (NH4)2S 
A)  K3N 
B)  AlF3 
C)  CaSO4 
D)  (NH4)2S

Question 15

Characterize EACH of the three given statements as being TRUE or FALSE and then indicate the collective true-false status of the statements using the choices: (1) If an atom loses one or more electrons, it becomes negatively charged because protons now outnumber electrons.
(2) Nitrogen, a group VA element, possesses five valence electrons.
(3) Polyatomic ions are generally not very stable and usually lose their identity during chemical reactions.

Accepted Answer

A)  All three statements are true. 
B)  Two of the three statements are true. 
C)  Only one of the statements is true. 
D)  None of the statements is true. 
A)  All three statements are true. 
B)  Two of the three statements are true. 
C)  Only one of the statements is true. 
D)  None of the statements is true.

Question 16

For representative elements, valence electrons are those electrons located

Accepted Answer

A)  closest to the nucleus 
B)  in the outermost subshell 
C)  in the outermost shell 
D)  in s orbitals 
A)  closest to the nucleus 
B)  in the outermost subshell 
C)  in the outermost shell 
D)  in s orbitals

Question 17

The correct formula for the ionic compound that might be formed between Na and As is

Accepted Answer

A)  Na3As 
B)  NaAs3 
C)  Na2As3 
D)  Na3As2 
A)  Na3As 
B)  NaAs3 
C)  Na2As3 
D)  Na3As2

Question 18

For which of the following elements is the listed number of valence electrons correct?

Accepted Answer

A)  Al - 3 valence electrons 
B)  Cl - 5 valence electrons 
C)  Si - 2 valence electrons 
D)  more than one correct response 
E)  no correct response 
A)  Al - 3 valence electrons 
B)  Cl - 5 valence electrons 
C)  Si - 2 valence electrons 
D)  more than one correct response 
E)  no correct response

Question 19

How many total electrons are present in a N3- ion?

Accepted Answer

A)  4 
B)  7 
C)  10 
D)  12 
A)  4 
B)  7 
C)  10 
D)  12

Question 20

In which of the following pairs of polyatomic ions do both members of the pair have the same charge?

Accepted Answer

A)  sulfate and phosphate 
B)  carbonate and hydroxide 
C)  ammonium and nitrate 
D)  more than one correct response 
E)  no correct response 
A)  sulfate and phosphate 
B)  carbonate and hydroxide 
C)  ammonium and nitrate 
D)  more than one correct response 
E)  no correct response

Exam 4: Chemical Bonding: the Ionic Bond Model

Choose the appropriate number of atoms contained in a formula unit of iron(II) hydroxide.

The "octet rule" relates to the number eight because:

Choose a formula from the response list with +1 charged monoatomic ions present.

The mechanism for ionic bond formation always involves the transferring of

Choose a formula from the response list with where the positive and negative ions present carry the same amount of charge.

In which of the following pairs of ionic compounds do both members of the pair contain +1 ions?

Elements in groups IIA and VIIA of the periodic table would, respectively, be expected to form ions with charges of

For the ion or element combinations of M3+ and X2-, choose the correct formula for the compound produced.

Which one of the following compounds has a formula that contains parentheses?

For the electron configuration 1s22s22p63s23p64s23d104p3, choose the appropriate number of valence electrons present from the response list.

In which of the following compounds is there a one-to-two ratio between positive and negative ions?

Choose a formula from the response list with -2 charged monoatomic ions present.

For representative elements, valence electrons are those electrons located

The correct formula for the ionic compound that might be formed between Na and As is

For which of the following elements is the listed number of valence electrons correct?

How many total electrons are present in a N3- ion?

In which of the following pairs of polyatomic ions do both members of the pair have the same charge?

Basic Concepts About Matter

Measurements in Chemistry

Atomic Structure and the Periodic Table

Chemical Bonding: the Covalent Bond Model

Chemical Calculations: Formula Masses, Moles, and Chemical Equations

Gases, Liquids, and Solids

Solutions

Chemical Reactions

Acids, Bases, and Salts

Nuclear Chemistry

Saturated Hydrocarbons

Unsaturated Hydrocarbons

Alcohols, Phenols, and Ethers

Aldehydes and Ketones

Carboxylic Acids, Esters, and Other Acid Derivatives

Amines and Amides

Carbohydrates

Lipids

Proteins

Enzymes and Vitamins

Nucleic Acids

Biochemical Energy Production

Carbohydrate Metabolism

Lipid Metabolism

Protein Metabolism

Filters

For the ion or element combinations of M³⁺ and X²^-, choose the correct formula for the compound produced.

For the electron configuration 1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p³, choose the appropriate number of valence electrons present from the response list.

How many total electrons are present in a N³^- ion?