Question 1

Which one of these ions is not isoelectronic with Kr?

Accepted Answer

A)  As3+
B)  Se2-
C)  Rb+
D)  Sr2+
E)  Br-F) D) and E)
G) A) and E)

Question 2

Explain how the elements in Group 4A differ from one another.

Accepted Answer

C is a nonmetal; Si ...

Question 3

The energy states of atoms containing more than one electron arise from nucleus-electron and electronelectron interactions.Which of the following statements correctly describes these effects?

Accepted Answer

A)  Larger nuclear charge lowers energy; more electrons in an orbital lowers energy.
B)  Larger nuclear charge lowers energy; more electrons in an orbital increases energy.
C)  Smaller nuclear charge lowers energy; more electrons in an orbital lowers energy.
D)  Smaller nuclear charge lowers energy; more electrons in an orbital increases energy.
E)  None of these statements is generally correct.F) A) and B)
G) A) and E)

Question 4

The elements in a column of the periodic table are known as

Accepted Answer

A)  metalloids.
B)  a period.
C)  noble gases.
D)  a group.
E)  nonmetals.F) B) and D)
G) A) and E)

Question 5

In Mendeleev's version of the periodic table,the elements were arranged in order of increasing atomic number.

Accepted Answer

A) True 
 B)False

Question 6

Which of these atoms has the smallest radius?

Accepted Answer

A)  Al
B)  P
C)  As
D)  Te
E)  NaF) A) and B)
G) A) and C)

Question 7

How does atomic radius change as you move across the periodic table?

Accepted Answer

A)  Atomic radius decreases moving from left to right across a period and increases from top to bottom.
B)  Atomic radius increases moving left to right across a period and decreases from top to bottom.
C)  Smaller nuclear charge lowers energy; more electrons in an orbital lowers energy.
D)  Atomic radius increases diagonally across the periodic table.
E)  None of the answers is correct.F) C) and E)
G) C) and D)

Question 8

What is the electron configuration for Fr?

Accepted Answer

A)  [Xe]6s1
B)  [Rn]7s1
C)  [Rn]7s2
D)  [Xe]6s2
E)  [Kr]6s1F) B) and E)
G) A) and B)

Question 9

Which of these pairs consists of isoelectronic species?

Accepted Answer

A)  Mn2+ and Ar
B)  Zn2+ and Cu2+
C)  Na+ and K+
D)  Cl- and S
E)  K+ and Cl-F) B) and C)
G) A) and E)

Question 10

Explain why hydrogen is placed in Group 1A even though it really belongs in a group by itself.

Accepted Answer

Hydrogen is typically placed a...

Question 11

Which species have the most similar atomic radii?

Accepted Answer

A)  S2- and Cl-
B)  Ar and As
C)  Rb+ and K+
D)  I- and Br -
E)  Br and CsF) C) and D)
G) D) and E)

Question 12

Explain how the elements in Group 6A differ from one another.

Accepted Answer

O,S,and Se are nonme...

Question 13

Moseley's measurements of nuclear charges of the elements provided the basis for arranging the elements of the periodic table in order of increasing atomic number.

Accepted Answer

A) True 
 B)False

Question 14

Which of these elements has the greatest metallic character?

Accepted Answer

A)  Br
B)  Se
C)  Ni
D)  As
E)  SiF) A) and B)
G) D) and E)

Question 15

Arrange P,S,and O in order of increasing atomic radius.

Accepted Answer

A)  S 
B)  P 
C)  O 
D)  O 
E)  The answer cannot be determined from the data given.F) A) and B)
G) B) and C)

Question 16

Consider the element with the electron configuration [Kr]5s24d7.This element is

Accepted Answer

A)  a halogen.
B)  a transition metal.
C)  a nonmetal.
D)  an actinide element.
E)  a noble gas.F) C) and D)
G) A) and B)

Question 17

The general electron configuration for noble gas atoms is

Accepted Answer

A)  ns2np6.
B)  ns2np5.
C)  ns2np4.
D)  ns2np3.
E)  ns2.F) D) and E)
G) B) and E)

Question 18

An aluminum ion,Al3+,has

Accepted Answer

A)  13 protons and 13 electrons.
B)  27 protons and 24 electrons.
C)  16 protons and 13 electrons.
D)  13 protons and 10 electrons.
E)  10 protons and 13 electrons.F) A) and B)
G) B) and C)

Question 19

Which element would be expected to have properties similar to calcium?

Accepted Answer

A)  Ba
B)  K
C)  Sc
D)  Na
E)  RbF) C) and E)
G) A) and E)

Question 20

Which one of the following equations correctly represents the process relating to the ionization energy of X?

Accepted Answer

A)  X(s) → X+(g) + e-
B)  X2(g) → X+(g) + X-(g) 
C)  X(g) + e- → X-(g) 
D)  X-(g) → X(g) + e-
E)  X(g) → X+(g) + e-F) C) and E)
G) A) and B)

Exam 7: Electron Configuration and the Periodic Table

Which species have the most similar atomic radii?

Correct AnswerverifiedShow Answer

Moseley's measurements of nuclear charges of the elements provided the basis for arranging the elements of the periodic table in order of increasing atomic number.

Correct AnswerverifiedShow Answer

An aluminum ion,Al3+,has

Correct AnswerverifiedShow Answer

The general electron configuration for noble gas atoms is

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In Mendeleev's version of the periodic table,the elements were arranged in order of increasing atomic number.

Correct AnswerverifiedShow Answer

Which of these elements has the greatest metallic character?

Correct AnswerverifiedShow Answer

Which element would be expected to have properties similar to calcium?

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Explain how the elements in Group 6A differ from one another.

Correct AnswerverifiedO,S,and Se are nonme...View AnswerShow Answer

Explain how the elements in Group 4A differ from one another.

Correct AnswerverifiedC is a nonmetal; Si ...View AnswerShow Answer

Explain why hydrogen is placed in Group 1A even though it really belongs in a group by itself.

Correct AnswerverifiedHydrogen is typically placed a...View AnswerShow Answer

The energy states of atoms containing more than one electron arise from nucleus-electron and electronelectron interactions.Which of the following statements correctly describes these effects?

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Which one of the following equations correctly represents the process relating to the ionization energy of X?

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Arrange P,S,and O in order of increasing atomic radius.

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Which one of these ions is not isoelectronic with Kr?

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Consider the element with the electron configuration [Kr]5s24d7.This element is

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Which of these atoms has the smallest radius?

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What is the electron configuration for Fr?

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How does atomic radius change as you move across the periodic table?

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The elements in a column of the periodic table are known as

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Which of these pairs consists of isoelectronic species?

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An aluminum ion,Al³⁺,has

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O,S,and Se are nonme...
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C is a nonmetal; Si ...
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Hydrogen is typically placed a...
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Consider the element with the electron configuration [Kr]5s²4d⁷.This element is

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