Question 1

How many valence electrons are there in an oxygen atom?

Accepted Answer

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

Question 2

One of the postulates of Dalton's theory was incorrect. Which of the following best describes the effect of the incorrect postulate?

Accepted Answer

A)  Since one postulate was incorrect the theory must be discarded. 
B)  The theory can still be used because the erroneous postulate does not have any effect on the physical properties of the elements. 
C)  The theory can still be used because the erroneous postulate does not have any effect on the chemical properties of the elements. 
D)  The theory can still be used because the erroneous postulate does not have any effect on either the chemical or physical properties of the elements. 
A)  Since one postulate was incorrect the theory must be discarded. 
B)  The theory can still be used because the erroneous postulate does not have any effect on the physical properties of the elements. 
C)  The theory can still be used because the erroneous postulate does not have any effect on the chemical properties of the elements. 
D)  The theory can still be used because the erroneous postulate does not have any effect on either the chemical or physical properties of the elements.

Question 3

Which of the following is the most characteristic feature of the electronic configurations of the elements in a vertical column?

Accepted Answer

A)  The electron configurations are identical. 
B)  The valence electrons are of the same type and number. 
C)  The valence electrons are always paired. 
D)  The valence electrons are never paired. 
A)  The electron configurations are identical. 
B)  The valence electrons are of the same type and number. 
C)  The valence electrons are always paired. 
D)  The valence electrons are never paired.

Question 4

Which of the following types of orbitals come in sets of seven?

Accepted Answer

A)  s 
B)  p 
C)  d 
D)  f 
A)  s 
B)  p 
C)  d 
D)  f

Question 5

The neutron got its name because which of the following is true?

Accepted Answer

A)  it neutralizes protons 
B)  it neutralizes electrons 
C)  it does not have an electrical charge 
D)  it has no effect on any atomic properties 
A)  it neutralizes protons 
B)  it neutralizes electrons 
C)  it does not have an electrical charge 
D)  it has no effect on any atomic properties

Question 6

Which of the following elements is named for a planet?

Accepted Answer

A)  As 
B)  Er 
C)  Pu 
D)  V 
A)  As 
B)  Er 
C)  Pu 
D)  V

Question 7

How many unpaired electrons are there in a nitrogen atom in its ground state?

Accepted Answer

A)  2 
B)  3 
C)  4 
D)  5 
A)  2 
B)  3 
C)  4 
D)  5

Question 8

How many orbitals are there in the 4p subshell?

Accepted Answer

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

Question 9

When a strong magnet is brought near a sample that contains both iron and sulfur the iron and the sulfur are separated from one another. What type of material is this sample?

Accepted Answer

A)  a compound 
B)  a homogeneous mixture 
C)  a heterogeneous mixture 
D)  There is insufficient information to answer. 
A)  a compound 
B)  a homogeneous mixture 
C)  a heterogeneous mixture 
D)  There is insufficient information to answer.

Question 10

What are the horizontal rows of the periodic table called?

Accepted Answer

A)  cycles 
B)  periods 
C)  families 
D)  none of these 
A)  cycles 
B)  periods 
C)  families 
D)  none of these

Question 11

What type of particles can atoms gain or lose when they become ions?

Accepted Answer

A)  protons 
B)  neutrons 
C)  electrons 
D)  It depends on the atom involved. 
A)  protons 
B)  neutrons 
C)  electrons 
D)  It depends on the atom involved.

Question 12

Which of the following is not a proper symbol for an element?

Accepted Answer

A)  C 
B)  Ca 
C)  CO 
D)  Co 
A)  C 
B)  Ca 
C)  CO 
D)  Co

Question 13

Which of the following contains two species which have the same mass number?

Accepted Answer

A)  14C, 14N 
B)  12C, 13C 
C)  both a and b 
D)  neither a nor b 
A)  14C, 14N 
B)  12C, 13C 
C)  both a and b 
D)  neither a nor b

Question 14

The properties of ductility, malleability, ability to conduct heat and electricity are characteristics of what type of material?

Accepted Answer

A)  all elements 
B)  metallic elements 
C)  metalloid elements 
D)  nonmetallic elements 
A)  all elements 
B)  metallic elements 
C)  metalloid elements 
D)  nonmetallic elements

Question 15

Suppose a new element named questinium has two isotopes. These isotopes are Qu-297 (40.30%, 296.78 amu) and Qu-301 (59.70%, 300.88 amu). What is the atomic weight of questinium, reported to the correct number of significant digits?

Accepted Answer

A)  299 amu 
B)  299.0 amu 
C)  299.12 amu 
D)  299.23 amu 
A)  299 amu 
B)  299.0 amu 
C)  299.12 amu 
D)  299.23 amu

Question 16

Which of the following give(s) the correct order of ionization energies?

Accepted Answer

A)  Li  Mg > P > Cl 
C)  both a and b 
D)  neither a nor b 
A)  Li  Mg > P > Cl 
C)  both a and b 
D)  neither a nor b

Question 17

How many unpaired electrons are there in an oxygen atom in its ground state?

Accepted Answer

A)  1 
B)  2 
C)  4 
D)  8 
A)  1 
B)  2 
C)  4 
D)  8

Question 18

Which of the following columns of the periodic table contains only gaseous elements?

Accepted Answer

A)  5A 
B)  6A 
C)  7A 
D)  8A 
A)  5A 
B)  6A 
C)  7A 
D)  8A

Question 19

In the region of the periodic table associated with the inner transition elements which type of orbitals are being filled?

Accepted Answer

A)  s 
B)  p 
C)  d 
D)  f 
A)  s 
B)  p 
C)  d 
D)  f

Question 20

Which is true of isotopes of an element?

Accepted Answer

A)  They have different numbers of electrons. 
B)  They have different numbers of neutrons. 
C)  They have different numbers of protons. 
D)  They have different chemical properties. 
A)  They have different numbers of electrons. 
B)  They have different numbers of neutrons. 
C)  They have different numbers of protons. 
D)  They have different chemical properties.

Exam 2: Atoms

How many valence electrons are there in an oxygen atom?

One of the postulates of Dalton's theory was incorrect. Which of the following best describes the effect of the incorrect postulate?

Which of the following is the most characteristic feature of the electronic configurations of the elements in a vertical column?

Which of the following types of orbitals come in sets of seven?

The neutron got its name because which of the following is true?

Which of the following elements is named for a planet?

How many unpaired electrons are there in a nitrogen atom in its ground state?

How many orbitals are there in the 4p subshell?

When a strong magnet is brought near a sample that contains both iron and sulfur the iron and the sulfur are separated from one another. What type of material is this sample?

What are the horizontal rows of the periodic table called?

What type of particles can atoms gain or lose when they become ions?

Which of the following is not a proper symbol for an element?

Which of the following contains two species which have the same mass number?

The properties of ductility, malleability, ability to conduct heat and electricity are characteristics of what type of material?

Suppose a new element named questinium has two isotopes. These isotopes are Qu-297 (40.30%, 296.78 amu) and Qu-301 (59.70%, 300.88 amu). What is the atomic weight of questinium, reported to the correct number of significant digits?

Which of the following give(s) the correct order of ionization energies?

How many unpaired electrons are there in an oxygen atom in its ground state?

Which of the following columns of the periodic table contains only gaseous elements?

In the region of the periodic table associated with the inner transition elements which type of orbitals are being filled?

Which is true of isotopes of an element?

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