Question 1

Which of the following atoms contains the largest number of neutrons?

Accepted Answer

A)  ${ } _ { 20 } ^ { 42 } \mathrm { Ca }$ 
B)  ${ } _ { 19 } ^ { 39 } \mathrm {~K}$ 
C)  ${ } _ { 17 } ^ { 37 } \mathrm { Cl }$ 
D)  ${ } _ { 19 } ^ { 41 } \mathrm {~K}$ 
E)  ${ } _ { 18 } ^ { 42 } \mathrm { Ar }$ 
A)  ${ } _ { 20 } ^ { 42 } \mathrm { Ca }$ 
B)  ${ } _ { 19 } ^ { 39 } \mathrm {~K}$ 
C)  ${ } _ { 17 } ^ { 37 } \mathrm { Cl }$ 
D)  ${ } _ { 19 } ^ { 41 } \mathrm {~K}$ 
E)  ${ } _ { 18 } ^ { 42 } \mathrm { Ar }$

Question 2

Which of the following elements is present in fourth period of group 3?

Accepted Answer

A)  Flourine 
B)  Chlorine 
C)  Barium 
D)  Argon 
E)  Sodium 
A)  Flourine 
B)  Chlorine 
C)  Barium 
D)  Argon 
E)  Sodium

Question 3

Calculate the mass of 0.50 mol of chromium(III) sulfide.

Accepted Answer

A)  2.5 × 10-3 g 
B)  5.9 × 10-3 g 
C)  42 g 
D)  1.0 × 102 g 
E)  110 g 
A)  2.5 × 10-3 g 
B)  5.9 × 10-3 g 
C)  42 g 
D)  1.0 × 102 g 
E)  110 g

Question 4

C2H2F4 is the formula for two possible molecules. C2H2F4 is an example of a(n) _____.

Accepted Answer

A)  structural formula 
B)  empirical formula 
C)  condensed formula 
D)  spatial formula 
E)  molecular formula 
A)  structural formula 
B)  empirical formula 
C)  condensed formula 
D)  spatial formula 
E)  molecular formula

Which of the following atoms contains the largest number of neutrons?

Which of the following elements is present in fourth period of group 3?

Calculate the mass of 0.50 mol of chromium(III) sulfide.

C₂H₂F₄ is the formula for two possible molecules. C₂H₂F₄ is an example of a(n) _____.

Basic Concepts of Chemistry

Lets Review: the Tools of Quantitative Chemistry

Chemical Reactions

Stoichiometry: Quantitative Information About Chemical Reactions

Principles of Chemical Reactivity: Energy and Chemical Reactions

The Structure of Atoms

The Structure of Atoms and Periodic Trends

Bonding and Molecular Structure

Bonding and Molecular Structure Orbital Hybridization and Molecular Orbitals

Gases and Their Properties

Intermolecular Forces and Liquids

The Solid State

Solutions and Their Behavior

Chemical Kinetics: the Rates of Chemical Reactions

Principles of Chemical Reactivity: Equilibria

Principles of Chemical Reactivity: the Chemistry of Acids and Bases

Principles of Chemical Reactivity: Other Aspects of Aqueous Equilibria

Principles of Chemical Reactivity: Entropy and Free Energy

Principles of Chemical Reactivity: Electron Transfer Reactions

Environmental Chemistry: Earths Environment, Energy, and Sustainability

The Chemistry of the Main Group Elements

The Chemistry of the Transition Elements

Carbon: Not Just Another Element

Biochemistry

Nuclear Chemistry

Filters

Exam 3: Atoms, Molecules, and Ions

Which of the following atoms contains the largest number of neutrons?

Which of the following elements is present in fourth period of group 3?

Calculate the mass of 0.50 mol of chromium(III) sulfide.

C2H2F4 is the formula for two possible molecules. C2H2F4 is an example of a(n) _____.

Basic Concepts of Chemistry

Lets Review: the Tools of Quantitative Chemistry

Chemical Reactions

Stoichiometry: Quantitative Information About Chemical Reactions

Principles of Chemical Reactivity: Energy and Chemical Reactions

The Structure of Atoms

The Structure of Atoms and Periodic Trends

Bonding and Molecular Structure

Bonding and Molecular Structure Orbital Hybridization and Molecular Orbitals

Gases and Their Properties

Intermolecular Forces and Liquids

The Solid State

Solutions and Their Behavior

Chemical Kinetics: the Rates of Chemical Reactions

Principles of Chemical Reactivity: Equilibria

Principles of Chemical Reactivity: the Chemistry of Acids and Bases

Principles of Chemical Reactivity: Other Aspects of Aqueous Equilibria

Principles of Chemical Reactivity: Entropy and Free Energy

Principles of Chemical Reactivity: Electron Transfer Reactions

Environmental Chemistry: Earths Environment, Energy, and Sustainability

The Chemistry of the Main Group Elements

The Chemistry of the Transition Elements

Carbon: Not Just Another Element

Biochemistry

Nuclear Chemistry

Filters

C₂H₂F₄ is the formula for two possible molecules. C₂H₂F₄ is an example of a(n) _____.