Question 1

An alpha particle is

Accepted Answer

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

Question 2

A radioisotope has a neutron/proton ratio which is too low.Which of the following processes will not occur for such a nucleus?

Accepted Answer

A) alpha emission 
B) beta emission 
C) electron capture 
D) positron emission 
A) alpha emission 
B) beta emission 
C) electron capture 
D) positron emission

Question 3

Which of the following elements would be expected to be particularly stable?

Accepted Answer

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

Question 4

The symbol of the isotope having Z = 88 and A = 226 is ________.

Accepted Answer

The answer of The symbol of the isotope having Z...

Question 5

Which of the following nuclides is most likely to undergo beta decay?

Accepted Answer

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

Question 6

The rate of a nuclear reaction can be changed by

Accepted Answer

A) adding a catalyst. 
B) decreasing the pressure. 
C) increasing the temperature. 
D) None of these 
A) adding a catalyst. 
B) decreasing the pressure. 
C) increasing the temperature. 
D) None of these

Question 7

How many electrons are in the ion,Cu2+?

Accepted Answer

A) 27 
B) 29 
C) 31 
D) 64 
A) 27 
B) 29 
C) 31 
D) 64

Question 8

In which of the following sets do all species have the same number of electrons?

Accepted Answer

A) Br-,Kr,Sr2+ 
B) C,N3-,O2- 
C) Mg2+,Sr2+,Ba2+ 
D) O,O2-,O2+ 
A) Br-,Kr,Sr2+ 
B) C,N3-,O2- 
C) Mg2+,Sr2+,Ba2+ 
D) O,O2-,O2+

Question 9

-What kind of decay process is occurring in the decay of isotope C to isotope D in the figure shown above?

Accepted Answer

A) α emission 
B) β emission 
C) γ emission 
D) electron capture or positron emission 
A) α emission 
B) β emission 
C) γ emission 
D) electron capture or positron emission

Question 10

Which of the following nuclides is most likely to decay by electron capture?

Accepted Answer

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

Question 11

Positron emission changes the atomic number of an element by

Accepted Answer

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

Question 12

The number of atoms in 23 g of Na is ________ (greater than,less than,the same as)the number of atoms in 12 g of C.

Accepted Answer

The answer of The number of atoms in 23 g...

Question 13

Which of the following statements is not a postulate of Dalton's atomic theory?

Accepted Answer

A) Each element is characterized by the mass of its atoms. 
B) Atoms are composed of protons,neutrons,and electrons. 
C) Chemical reactions only rearrange atomic combinations. 
D) Elements are composed of atoms. 
A) Each element is characterized by the mass of its atoms. 
B) Atoms are composed of protons,neutrons,and electrons. 
C) Chemical reactions only rearrange atomic combinations. 
D) Elements are composed of atoms.

Question 14

The formula of iron(III)oxide contains ________ iron(III)and ________ oxide ions.

Accepted Answer

The answer of The formula of iron(III)oxide contains ________ iron(III)and...

Question 15

How many protons (p),neutrons (n),and electrons (e)are in one atom of  
?

Accepted Answer

A) 12 p,12 n,12 e 
B) 12 p,11 n,12 e 
C) 12 p,11 n,10 e 
D) 12 p,11 n,14 e 
A) 12 p,12 n,12 e 
B) 12 p,11 n,12 e 
C) 12 p,11 n,10 e 
D) 12 p,11 n,14 e

Question 16

A sample of pure lithium carbonate contains 18.8.4% lithium by mass.What is the % lithium by mass in a sample of pure lithium carbonate that has twice the mass of the first sample?

Accepted Answer

A) 9)40% 
B) 18.8% 
C) 37.6% 
D) 75.2% 
A) 9)40% 
B) 18.8% 
C) 37.6% 
D) 75.2%

Question 17

Beta decay of 24Na produces a beta particle and

Accepted Answer

A) (20F.) 
B) (23Na.) 
C) (24Ne.) 
D) (24Mg.) 
A) (20F.) 
B) (23Na.) 
C) (24Ne.) 
D) (24Mg.)

Question 18

Which of the following figures represents  
? Unshaded spheres represent neutrons and shaded spheres represent protons.

Accepted Answer

A) figure (1) 
B) figure (2) 
C) figure (3) 
D) figure (4) 
A) figure (1) 
B) figure (2) 
C) figure (3) 
D) figure (4)

Question 19

The bonding in MgO is ________,whereas the bonding in CO is ________.

Accepted Answer

The answer of The bonding in MgO is ________,whereas the...

Question 20

Use the periodic table below to answer the following questions.  
-Which is most likely to form a binary oxide with the formula MO (where M = element A,B,C,or D)?

Accepted Answer

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

Exam 2: Atoms, molecules, and Ions

An alpha particle is

A radioisotope has a neutron/proton ratio which is too low.Which of the following processes will not occur for such a nucleus?

Which of the following elements would be expected to be particularly stable?

The symbol of the isotope having Z = 88 and A = 226 is ________.

Which of the following nuclides is most likely to undergo beta decay?

The rate of a nuclear reaction can be changed by

How many electrons are in the ion,Cu2+?

In which of the following sets do all species have the same number of electrons?

-What kind of decay process is occurring in the decay of isotope C to isotope D in the figure shown above?

Which of the following nuclides is most likely to decay by electron capture?

Positron emission changes the atomic number of an element by

The number of atoms in 23 g of Na is ________ (greater than,less than,the same as)the number of atoms in 12 g of C.

Which of the following statements is not a postulate of Dalton's atomic theory?

The formula of iron(III)oxide contains ________ iron(III)and ________ oxide ions.

How many protons (p),neutrons (n),and electrons (e)are in one atom of ?

A sample of pure lithium carbonate contains 18.8.4% lithium by mass.What is the % lithium by mass in a sample of pure lithium carbonate that has twice the mass of the first sample?

Beta decay of 24Na produces a beta particle and

Which of the following figures represents ? Unshaded spheres represent neutrons and shaded spheres represent protons.

The bonding in MgO is ________,whereas the bonding in CO is ________.

Use the periodic table below to answer the following questions. -Which is most likely to form a binary oxide with the formula MO (where M = element A,B,C,or D)?

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

How many electrons are in the ion,Cu²⁺?

The formula of iron(III)oxide contains iron(III)and oxide ions.

Beta decay of ²⁴Na produces a beta particle and

The bonding in MgO is ,whereas the bonding in CO is .