Question 1

A compound contains magnesium and phosphate.What is the formula unit of this compound?

Accepted Answer

A)  Mg3P2 
B)  MgPO4 
C)  Mg3(PO4)2 
D)  Mg2(PO4)3 
E)  MgHPO4 
A)  Mg3P2 
B)  MgPO4 
C)  Mg3(PO4)2 
D)  Mg2(PO4)3 
E)  MgHPO4

Question 2

Which of the following is NOT a valid ionic formula?

Accepted Answer

A)  NaF 
B)  MgO 
C)  KCl2 
D)  CaF2 
E)  Na2O 
A)  NaF 
B)  MgO 
C)  KCl2 
D)  CaF2 
E)  Na2O

Question 3

Which is the BEST Lewis structure for a molecule with the formula HCN?

Accepted Answer

A)  structure a 
B)  structure b 
C)  structure c 
D)  structure d 
E)  structure e 
A)  structure a 
B)  structure b 
C)  structure c 
D)  structure d 
E)  structure e

Question 4

The conventional way of writing the symbol for an ion of calcium is

Accepted Answer

A)  calcium-18. 
B)  Ar. 
C)  Ca-18. 
D)  Ca2+. 
E)  Ca2+. 
A)  calcium-18. 
B)  Ar. 
C)  Ca-18. 
D)  Ca2+. 
E)  Ca2+.

Question 5

______ is necessary for signaling in neurons and muscle cells.

Accepted Answer

A)  Glucose 
B)  Urea 
C)  Potassium 
D)  Amino acids 
E)  Electrolytes 
A)  Glucose 
B)  Urea 
C)  Potassium 
D)  Amino acids 
E)  Electrolytes

Question 6

The total number of valence electrons in methane is

Accepted Answer

A)  2. 
B)  4. 
C)  8. 
D)  16. 
E)  40. 
A)  2. 
B)  4. 
C)  8. 
D)  16. 
E)  40.

Question 7

What ionic compound has the formula Na2O?

Accepted Answer

A)  disodium oxide 
B)  sodium oxide 
C)  sodium dioxide 
D)  sodium oxygen 
E)  disodium oxygen 
A)  disodium oxide 
B)  sodium oxide 
C)  sodium dioxide 
D)  sodium oxygen 
E)  disodium oxygen

Question 8

How many electrons are shared by the circled carbon and oxygen of acetone?

Accepted Answer

A)  0 
B)  2 
C)  4 
D)  6 
E)  8 
A)  0 
B)  2 
C)  4 
D)  6 
E)  8

Question 9

What are the charges on the ions in Li2O?

Accepted Answer

A)  Li has a -1 charge, and O has a +1 charge. 
B)  Li has a +1 charge, and O has a -1 charge. 
C)  Li has a -1 charge, and O has a +2 charge. 
D)  Li has a +1 charge, and O has a -2 charge. 
E)  Neither lithium nor oxygen is charged. 
A)  Li has a -1 charge, and O has a +1 charge. 
B)  Li has a +1 charge, and O has a -1 charge. 
C)  Li has a -1 charge, and O has a +2 charge. 
D)  Li has a +1 charge, and O has a -2 charge. 
E)  Neither lithium nor oxygen is charged.

Question 10

Which of these structures is a diatomic molecule?

Accepted Answer

A)  I 
B)  II 
C)  III 
D)  IV 
E)  V 
A)  I 
B)  II 
C)  III 
D)  IV 
E)  V

Question 11

Lead(II)is especially harmful to young children because it_________.

Accepted Answer

A)  halts bone growth 
B)  causes loss of appetite 
C)  damages the retina 
D)  damages the heart 
E)  harms brain development 
A)  halts bone growth 
B)  causes loss of appetite 
C)  damages the retina 
D)  damages the heart 
E)  harms brain development

Question 12

An ion that has more electrons than protons is a(n)________.

Accepted Answer

A)  cation 
B)  anion 
C)  ionic bond 
D)  covalent bond 
E)  salt 
A)  cation 
B)  anion 
C)  ionic bond 
D)  covalent bond 
E)  salt

Question 13

In which of the structures are six electrons being shared between two atoms?

Accepted Answer

A)  I 
B)  II 
C)  III 
D)  IV 
E)  V 
A)  I 
B)  II 
C)  III 
D)  IV 
E)  V

Question 14

Elements in group 17 (7A)of the periodic table are likely to form ions with the charge

Accepted Answer

A)  -3. 
B)  -2. 
C)  -1. 
D)  +1. 
E)  +2. 
A)  -3. 
B)  -2. 
C)  -1. 
D)  +1. 
E)  +2.

Question 15

Which of the following ions is a polyatomic ion?

Accepted Answer

A)  NH4+ 
B)  Mg2+ 
C)  O2- 
D)  O2 
E)  C2H6 
A)  NH4+ 
B)  Mg2+ 
C)  O2- 
D)  O2 
E)  C2H6

Question 16

Carbon tetrafluoride is a refrigerant and potent greenhouse gas.Which of the following is the molecular formula for this compound?

Accepted Answer

A)  CF 
B)  C(IV)F 
C)  C4F4 
D)  C4F 
E)  CF4 
A)  CF 
B)  C(IV)F 
C)  C4F4 
D)  C4F 
E)  CF4

Question 17

What is the name of Na2SO3, a preservative in many foods and drinks?

Accepted Answer

A)  sodium sulfite 
B)  sodium sulfate 
C)  disodium sulfur trioxide 
D)  sodium sulfur trioxide 
E)  disodium trisulfite 
A)  sodium sulfite 
B)  sodium sulfate 
C)  disodium sulfur trioxide 
D)  sodium sulfur trioxide 
E)  disodium trisulfite

Question 18

An atom of magnesium is shown below.The charge on this ion is _______ making the ion a _______.

Accepted Answer

A)  -10; anion 
B)  -2; anion 
C)  -2; cation 
D)  + 2; anion 
E)  + 2; cation 
A)  -10; anion 
B)  -2; anion 
C)  -2; cation 
D)  + 2; anion 
E)  + 2; cation

Question 19

Which statement BEST describes the meaning of an expanded octet?

Accepted Answer

A)  "Expanded octets" are molecules in which an element expands its valence shell to gain an octet of electrons. 
B)  "Expanded octets" is a term that describes atoms that have more than eight electrons in their valence shells. 
C)  "Expanded octets" refers to atoms that, when bonded, must be larger than normal. 
D)  "Expanded octets" is used to describe elements that do not normally form an octet when bonded and would therefore have to expand to form the octet. 
E)  "Expanded octets" is used to describe how atoms accept electrons to attain a full valence shell. 
A)  "Expanded octets" are molecules in which an element expands its valence shell to gain an octet of electrons. 
B)  "Expanded octets" is a term that describes atoms that have more than eight electrons in their valence shells. 
C)  "Expanded octets" refers to atoms that, when bonded, must be larger than normal. 
D)  "Expanded octets" is used to describe elements that do not normally form an octet when bonded and would therefore have to expand to form the octet. 
E)  "Expanded octets" is used to describe how atoms accept electrons to attain a full valence shell.

Question 20

What is the name of CS2, an industrial solvent?

Accepted Answer

A)  carbon sulfite 
B)  carbon sulfide 
C)  carbon disulfide 
D)  carbon sulfur 
E)  carbon disulfur 
A)  carbon sulfite 
B)  carbon sulfide 
C)  carbon disulfide 
D)  carbon sulfur 
E)  carbon disulfur

A compound contains magnesium and phosphate.What is the formula unit of this compound?

Which of the following is NOT a valid ionic formula?

Which is the BEST Lewis structure for a molecule with the formula HCN?

The conventional way of writing the symbol for an ion of calcium is

______ is necessary for signaling in neurons and muscle cells.

The total number of valence electrons in methane is

What ionic compound has the formula Na₂O?

How many electrons are shared by the circled carbon and oxygen of acetone?

What are the charges on the ions in Li₂O?

Which of these structures is a diatomic molecule?

Lead(II)is especially harmful to young children because it_________.

An ion that has more electrons than protons is a(n)________.

In which of the structures are six electrons being shared between two atoms?

Elements in group 17 (7A)of the periodic table are likely to form ions with the charge

Which of the following ions is a polyatomic ion?

Carbon tetrafluoride is a refrigerant and potent greenhouse gas.Which of the following is the molecular formula for this compound?

What is the name of Na₂SO₃, a preservative in many foods and drinks?

An atom of magnesium is shown below.The charge on this ion is _ making the ion a _.

Which statement BEST describes the meaning of an expanded octet?

What is the name of CS₂, an industrial solvent?

Matter, Energy, and Measurement

Atomic Structure and Radioisotopes

Molecular Geometry, Polarity, and Intermolecular

Chemical Quantities and Introduction to Reactions

Chemical Reactions: Energy, Rates, and Equilibrium

Changes of State and Gas Laws

Mixtures, Solution Concentrations, and Diffusion

Acids and Bases, Ph, and Buffers

Introduction to Organic Chemistry:

Alcohols, Phenols, Thiols, Ethers, and Amines

The Carbonyl Containing Functional Groups

The Common Organic Reactions in Biochemistry

Carbohydrates: Structure and Function

Lipids: Structure and Function

Proteins: Structure and Function

Nucleotides and Nucleic Acids

Energy and Metabolism

Filters

Exam 3: Ionic and Covalent Compounds

A compound contains magnesium and phosphate.What is the formula unit of this compound?

Which of the following is NOT a valid ionic formula?

Which is the BEST Lewis structure for a molecule with the formula HCN?

The conventional way of writing the symbol for an ion of calcium is

______ is necessary for signaling in neurons and muscle cells.

The total number of valence electrons in methane is

What ionic compound has the formula Na2O?

How many electrons are shared by the circled carbon and oxygen of acetone?

What are the charges on the ions in Li2O?

Which of these structures is a diatomic molecule?

Lead(II)is especially harmful to young children because it_________.

An ion that has more electrons than protons is a(n)________.

In which of the structures are six electrons being shared between two atoms?

Elements in group 17 (7A)of the periodic table are likely to form ions with the charge

Which of the following ions is a polyatomic ion?

Carbon tetrafluoride is a refrigerant and potent greenhouse gas.Which of the following is the molecular formula for this compound?

What is the name of Na2SO3, a preservative in many foods and drinks?

An atom of magnesium is shown below.The charge on this ion is _______ making the ion a _______.

Which statement BEST describes the meaning of an expanded octet?

What is the name of CS2, an industrial solvent?

Matter, Energy, and Measurement

Atomic Structure and Radioisotopes

Molecular Geometry, Polarity, and Intermolecular

Chemical Quantities and Introduction to Reactions

Chemical Reactions: Energy, Rates, and Equilibrium

Changes of State and Gas Laws

Mixtures, Solution Concentrations, and Diffusion

Acids and Bases, Ph, and Buffers

Introduction to Organic Chemistry:

Alcohols, Phenols, Thiols, Ethers, and Amines

The Carbonyl Containing Functional Groups

The Common Organic Reactions in Biochemistry

Carbohydrates: Structure and Function

Lipids: Structure and Function

Proteins: Structure and Function

Nucleotides and Nucleic Acids

Energy and Metabolism

Filters

What ionic compound has the formula Na₂O?

What are the charges on the ions in Li₂O?

What is the name of Na₂SO₃, a preservative in many foods and drinks?

An atom of magnesium is shown below.The charge on this ion is _ making the ion a _.

What is the name of CS₂, an industrial solvent?