Question 1

Gamma radiation can be described as

Accepted Answer

A) a helium nucleus. 
B) a negatively charged free electron. 
C) high energy electromagnetic radiation. 
D) a positively charged free electron. 
A) a helium nucleus. 
B) a negatively charged free electron. 
C) high energy electromagnetic radiation. 
D) a positively charged free electron.

Question 2

Assume that the mixture of substances in drawing (1)undergoes a chemical reaction.Which of the drawings (2)-(4)represents a product mixture that is consistent with the law of mass conservation?

Accepted Answer

A) drawing (2) 
B) drawing (3) 
C) drawing (4) 
A) drawing (2) 
B) drawing (3) 
C) drawing (4)

Question 3

The number of neutrons in a neutral atom of uranium-238 is ________.

Accepted Answer

The answer of The number of neutrons in a neutral...

Question 4

The ion NO2- is named

Accepted Answer

A) nitrate ion. 
B) nitrite ion. 
C) nitrogen dioxide ion. 
D) nitrogen(II)oxide ion. 
A) nitrate ion. 
B) nitrite ion. 
C) nitrogen dioxide ion. 
D) nitrogen(II)oxide ion.

Question 5

To the nearest whole number,the number of grams of Ba in 3.25 mol of Ba is ________.

Accepted Answer

The answer of To the nearest whole number,the number of...

Question 6

The existence of neutrons in the nucleus of an atom was demonstrated by

Accepted Answer

A) Millikan's oil drop experiment. 
B) Rutherford's gold foil experiment. 
C) Thomson's cathode ray tube experiment. 
D) None of these 
A) Millikan's oil drop experiment. 
B) Rutherford's gold foil experiment. 
C) Thomson's cathode ray tube experiment. 
D) None of these

Question 7

A positron is

Accepted Answer

A)    . 
B)    . 
C)    . 
D)    . 
A)    . 
B)    . 
C)    . 
D)    .

Question 8

In a nuclear reaction   
is the symbol for ________.

Accepted Answer

The answer of In a nuclear reaction   
is...

Question 9

The number of neutrons in  
Is

Accepted Answer

A) 26. 
B) 29. 
C) 53. 
D) 55. 
A) 26. 
B) 29. 
C) 53. 
D) 55.

Question 10

Li2S is named

Accepted Answer

A) lithium disulfide. 
B) lithium sulfide. 
C) lithium(II)sulfide. 
D) lithium sulfur. 
A) lithium disulfide. 
B) lithium sulfide. 
C) lithium(II)sulfide. 
D) lithium sulfur.

Question 11

In the following drawings,shaded spheres represent cations and unshaded spheres represent anions.  
-Which drawing represents the ionic compound Na2CO3?

Accepted Answer

A) drawing (a) 
B) drawing (b) 
C) drawing (c) 
D) drawing (d) 
A) drawing (a) 
B) drawing (b) 
C) drawing (c) 
D) drawing (d)

Question 12

-Which of the above drawings represents a pure element?

Accepted Answer

A) drawing (a) 
B) drawing (b) 
C) drawing (c) 
A) drawing (a) 
B) drawing (b) 
C) drawing (c)

Question 13

Atoms of the same element always have the same number of ________ in their nuclei.

Accepted Answer

The answer of Atoms of the same element always have...

Question 14

In the following drawings,shaded spheres represent cations and unshaded spheres represent anions.  
-Which drawing represents the ionic compound NH4ClO4?

Accepted Answer

A) drawing (a) 
B) drawing (b) 
C) drawing (c) 
D) drawing (d) 
A) drawing (a) 
B) drawing (b) 
C) drawing (c) 
D) drawing (d)

Question 15

In an electron capture reaction a proton is converted into a ________.

Accepted Answer

The answer of In an electron capture reaction a proton...

Question 16

The compound,NO2,is named

Accepted Answer

A) nitrate. 
B) nitrite. 
C) nitrogen dioxide. 
D) nitrogen(IV)oxide. 
A) nitrate. 
B) nitrite. 
C) nitrogen dioxide. 
D) nitrogen(IV)oxide.

Question 17

-Which of the above drawings represents a pure compound?

Accepted Answer

A) drawing (a) 
B) drawing (b) 
C) drawing (c) 
A) drawing (a) 
B) drawing (b) 
C) drawing (c)

Question 18

A banana split is an example of

Accepted Answer

A) a compound. 
B) an element. 
C) a heterogeneous mixture. 
D) a homogeneous mixture. 
A) a compound. 
B) an element. 
C) a heterogeneous mixture. 
D) a homogeneous mixture.

Question 19

Which of the following elements has the least tendency to form an ion?

Accepted Answer

A) Ca 
B) K 
C) Kr 
D) Se 
A) Ca 
B) K 
C) Kr 
D) Se

Question 20

In addition to a beta particle,what is the other product of beta decay of  
?

Accepted Answer

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

Exam 2: Atoms, molecules, and Ions

Gamma radiation can be described as

Assume that the mixture of substances in drawing (1)undergoes a chemical reaction.Which of the drawings (2)-(4)represents a product mixture that is consistent with the law of mass conservation?

The number of neutrons in a neutral atom of uranium-238 is ________.

The ion NO2- is named

To the nearest whole number,the number of grams of Ba in 3.25 mol of Ba is ________.

The existence of neutrons in the nucleus of an atom was demonstrated by

A positron is

In a nuclear reaction is the symbol for ________.

The number of neutrons in Is

Li2S is named

In the following drawings,shaded spheres represent cations and unshaded spheres represent anions. -Which drawing represents the ionic compound Na2CO3?

-Which of the above drawings represents a pure element?

Atoms of the same element always have the same number of ________ in their nuclei.

In the following drawings,shaded spheres represent cations and unshaded spheres represent anions. -Which drawing represents the ionic compound NH4ClO4?

In an electron capture reaction a proton is converted into a ________.

The compound,NO2,is named

-Which of the above drawings represents a pure compound?

A banana split is an example of

Which of the following elements has the least tendency to form an ion?

In addition to a beta particle,what is the other product of beta decay of ?

Chemistry: Matter and Measurement

Formulas, equations, and Moles

Reactions in Aqueous Solutions

Periodicity and the Atomic Structure of Atoms

Ionic Bonds and Some Main-Group Chemistry

Covalent Bonds and Molecular Structure

Thermochemistry: Chemical Energy

Gases: Their Properties and Behavior

Liquids,solids,and Phase Changes

Solutions and Their Properties

Chemical Kinetics

Chemical Equilibrium

Aqueous Equilibria: Acids and Bases

Applications of Aqueous Equilibria

Thermodynamics: Entropy, free Energy, and Equilibrium

Electrochemistry

Hydrogen, oxygen, and Water

The Main-Group Elements

Transition Elements and Coordination Chemistry

Metals and Solid-State Materials

Nuclear Chemistry

Organic and Biological Chemistry

Filters

The ion NO₂^- is named

Li₂S is named

In the following drawings,shaded spheres represent cations and unshaded spheres represent anions. -Which drawing represents the ionic compound Na₂CO₃?

In the following drawings,shaded spheres represent cations and unshaded spheres represent anions. -Which drawing represents the ionic compound NH₄ClO₄?

The compound,NO₂,is named