Question 1

Which of the following formulas represents a compound that is an acid?

Accepted Answer

A) CaSO4 
B) NH4Cl 
C) Mg(OH)2 
D) H2O 
E) H3PO4 
A) CaSO4 
B) NH4Cl 
C) Mg(OH)2 
D) H2O 
E) H3PO4

Question 2

What is the most likely charge on an ion formed by an element with a valence electron configuration of ns2np1?

Accepted Answer

A) 3- 
B) 1- 
C) 1+ 
D) 3+ 
E) 5+ 
A) 3- 
B) 1- 
C) 1+ 
D) 3+ 
E) 5+

Question 3

The property that describes the ease with which an atom gives up an electron to form a positive ion is

Accepted Answer

A) atomic number. 
B) electron affinity. 
C) electronegativity. 
D) ionization energy. 
E) none of the above 
A) atomic number. 
B) electron affinity. 
C) electronegativity. 
D) ionization energy. 
E) none of the above

Question 4

Which pair of elements is most likely to form an ionic compound if allowed to react together?

Accepted Answer

A) Al and Si 
B) Fe and Ca 
C) C and F 
D) K and Br 
E) H and N 
A) Al and Si 
B) Fe and Ca 
C) C and F 
D) K and Br 
E) H and N

Question 5

The statement that best describes the formation of an ionic compound is:

Accepted Answer

A) Electrons are transferred from a metal to a non-metal,and the resulting charged particles form a crystalline network. 
B) Electrons are transferred from a non-metal to a metal,and the resulting charged particles form a crystalline network. 
C) Electrons are shared between two atoms and discrete molecules are formed. 
D) Electrons move freely among a network of nuclei in fixed positions. 
E) Each atom achieves an octet using electrons provided from an external electrical supply. 
A) Electrons are transferred from a metal to a non-metal,and the resulting charged particles form a crystalline network. 
B) Electrons are transferred from a non-metal to a metal,and the resulting charged particles form a crystalline network. 
C) Electrons are shared between two atoms and discrete molecules are formed. 
D) Electrons move freely among a network of nuclei in fixed positions. 
E) Each atom achieves an octet using electrons provided from an external electrical supply.

Question 6

What is the formula of the carbonate ion?

Accepted Answer

A) CO2 3- 
B) CO3 2- 
C) C2O4 2- 
D) C2O4 -1 
E) C2H3O2 -1 
A) CO2 3- 
B) CO3 2- 
C) C2O4 2- 
D) C2O4 -1 
E) C2H3O2 -1

Question 7

What is the name of K2S?

Accepted Answer

A) dipotassium sulfide 
B) potassium disulfide 
C) potassium(II)sulfide 
D) potassium sulfide 
E) none of the above 
A) dipotassium sulfide 
B) potassium disulfide 
C) potassium(II)sulfide 
D) potassium sulfide 
E) none of the above

Question 8

A formula unit of ammonium sulfate consists of ________ ammonium ions and ________ sulfate ions.

Accepted Answer

A) one; two 
B) two; one 
C) two; three 
D) three; two 
E) four; four 
A) one; two 
B) two; one 
C) two; three 
D) three; two 
E) four; four

Question 9

Which of the following elements is most likely to form an ion with a +2 charge?

Accepted Answer

A) Mg 
B) Si 
C) S 
D) K 
E) Br 
A) Mg 
B) Si 
C) S 
D) K 
E) Br

Question 10

What is the formula for calcium phosphate?

Accepted Answer

A) Ca3(PO4)2 
B) Ca2PO4 
C) Ca3PO4 
D) Ca2(PO3)3 
E) Ca4(PO3)3 
A) Ca3(PO4)2 
B) Ca2PO4 
C) Ca3PO4 
D) Ca2(PO3)3 
E) Ca4(PO3)3

Question 11

The name of the compound with formula NaMnO4 is

Accepted Answer

A) sodium magnesium oxide. 
B) sodium magnesium tetraoxide. 
C) sodium manganate. 
D) sodium permanganate. 
E) sodium manganese tetraoxide. 
A) sodium magnesium oxide. 
B) sodium magnesium tetraoxide. 
C) sodium manganate. 
D) sodium permanganate. 
E) sodium manganese tetraoxide.

Question 12

An atom with 3 valence electrons will most likely

Accepted Answer

A) lose three electrons. 
B) gain three electrons. 
C) gain five electrons. 
D) gain one electron. 
E) lose one electron. 
A) lose three electrons. 
B) gain three electrons. 
C) gain five electrons. 
D) gain one electron. 
E) lose one electron.

Question 13

One definition of a base is a substance that provides which ion in water solution?

Accepted Answer

A) Na+ 
B) H+ 
C) OH- 
D) H3O+ 
E) NH4+ 
A) Na+ 
B) H+ 
C) OH- 
D) H3O+ 
E) NH4+

Question 14

When an atom donates an electron,that electron

Accepted Answer

A) is lost for all time. 
B) is acquired by another atom which becomes an anion. 
C) is acquired by another atom which becomes a cation. 
D) neutralizes a proton to form a neutron. 
E) pairs with another electron to form a covalent bond. 
A) is lost for all time. 
B) is acquired by another atom which becomes an anion. 
C) is acquired by another atom which becomes a cation. 
D) neutralizes a proton to form a neutron. 
E) pairs with another electron to form a covalent bond.

Question 15

Which one of the compounds below is most likely to be ionic?

Accepted Answer

A) SrBr2 
B) NO2 
C) CBr4 
D) H2O 
A) SrBr2 
B) NO2 
C) CBr4 
D) H2O

Question 16

The correct Roman numeral for the chromium ion in the compound CrCl3 is

Accepted Answer

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

Question 17

The permanganate ion is composed of

Accepted Answer

A) one atom of magnesium,four atoms of oxygen,and one extra electron. 
B) one atom of manganese,four atoms of oxygen,and one extra electron. 
C) four atoms of magnesium,four atoms of oxygen,and one extra electron. 
D) four atoms of manganese,four atoms of oxygen,and one extra electron. 
E) one manganese(II)ion,four oxide ions,and two extra electrons. 
A) one atom of magnesium,four atoms of oxygen,and one extra electron. 
B) one atom of manganese,four atoms of oxygen,and one extra electron. 
C) four atoms of magnesium,four atoms of oxygen,and one extra electron. 
D) four atoms of manganese,four atoms of oxygen,and one extra electron. 
E) one manganese(II)ion,four oxide ions,and two extra electrons.

Question 18

What is the formula of the ammonium ion?

Accepted Answer

A) Am- 
B) Am+ 
C) NH4 + 
D) NH4+ 
E) N4H+ 
A) Am- 
B) Am+ 
C) NH4 + 
D) NH4+ 
E) N4H+

Question 19

What fourth period element is represented by the dot structure shown?
X:

Accepted Answer

A) K 
B) Ca 
C) V 
D) As 
E) Ti 
A) K 
B) Ca 
C) V 
D) As 
E) Ti

Question 20

Predict the charge that would be found on a carbide ion and on a nitride ion.Explain why these ions are seldom found in compounds.

Accepted Answer

The names of both ions end in "ide," sug

Exam 3: Ionic Compounds

Which of the following formulas represents a compound that is an acid?

What is the most likely charge on an ion formed by an element with a valence electron configuration of ns2np1?

The property that describes the ease with which an atom gives up an electron to form a positive ion is

Which pair of elements is most likely to form an ionic compound if allowed to react together?

The statement that best describes the formation of an ionic compound is:

What is the formula of the carbonate ion?

What is the name of K2S?

A formula unit of ammonium sulfate consists of ________ ammonium ions and ________ sulfate ions.

Which of the following elements is most likely to form an ion with a +2 charge?

What is the formula for calcium phosphate?

The name of the compound with formula NaMnO4 is

An atom with 3 valence electrons will most likely

One definition of a base is a substance that provides which ion in water solution?

When an atom donates an electron,that electron

Which one of the compounds below is most likely to be ionic?

The correct Roman numeral for the chromium ion in the compound CrCl3 is

The permanganate ion is composed of

What is the formula of the ammonium ion?

What fourth period element is represented by the dot structure shown? X:

Predict the charge that would be found on a carbide ion and on a nitride ion.Explain why these ions are seldom found in compounds.

Matter and Measurements

Atoms and the Periodic Table

Molecular Compounds

Classification and Balancing of Chemical Reactions

Chemical Reactions: Mole and Mass Relationships

Chemical Reactions: Energy, rates, and Equilibrium

Gases, liquids, and Solids

Solutions

Acids and Bases

Nuclear Chemistry

Introduction to Organic Chemistry: Alkanes

Alkenes, alkynes, and Aromatic Compounds

Some Compounds With Oxygen, sulfur, or a Halogen

Amines

Aldehydes and Ketones

Carboxylic Acids and Their Derivatives

Amino Acids and Proteins

Enzymes and Vitamins

The Generation of Biochemical Energy

Carbohydrates

Carbohydrate Metabolism

Lipids

Lipid Metabolism

Nucleic Acids and Protein Synthesis

Genomics

Protein and Amino Acid Metabolism

Chemical Messengers: Hormones, neurotransmitters, and Drugs

Body Fluids

Filters

What is the most likely charge on an ion formed by an element with a valence electron configuration of ns²np¹?

What is the name of K₂S?

A formula unit of ammonium sulfate consists of ammonium ions and sulfate ions.

The name of the compound with formula NaMnO₄ is

The correct Roman numeral for the chromium ion in the compound CrCl₃ is