Question 1

The electron configuration of a cobalt(III)  ion is

Accepted Answer

A)   [Ar]3d5.
B)   [Ar]4s13d5.
C)   [Ar]4s23d4.
D)   [Ar]3d6.
E)   [Ar]4s23d9.F) None of the above
G) C) and D)

Question 2

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) A) and E)
G) C) and E)

Question 3

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) B) and C)
G) A) and D)

Question 4

If the radius of atom X is greater than the radius of atom Y, then it is also likely that

Accepted Answer

A)   X has a larger electron affinity than Y does.
B)   X has a larger effective nuclear charge than Y does.
C)   X has greater metallic character than Y does.
D)   X has a larger first ionization energy than Y does.
E)   X is a poorer conductor of electricity than Y when in the solid state.F) C) and D)
G) A) and E)

Question 5

Which of these elements has the greatest metallic character?

Accepted Answer

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

Question 6

Select the element with the greatest metallic character.

Accepted Answer

A)   Li
B)   Ca
C)   Al
D)   Pb
E)   CsF) None of the above
G) C) and E)

Question 7

Consider the set of isoelectronic atoms and ions A2-, B-, C, D+, and E2+. Which arrangement of relative radii is correct?

Accepted Answer

A)   A2- > B- > C > D+ > E2+
B)   E2+ > D+ > C > B- > A2-
C)   A2- > B- > C + 2+ 
D)   A2- -  D+ > E2+
E)   None of these relative radii statements is correct.F) B) and C)
G) A) and B)

Question 8

What is the definition of nuclear charge, labeled Z?

Accepted Answer

The number...

Question 9

Which ground-state ion does not have an electron configuration described by the following orbital diagram? + B)  Cr2+ C)  Mn3+ D)  Co5+ E)  Fe4+" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)   V+
B)   Cr2+
C)   Mn3+
D)   Co5+
E)   Fe4+F) B) and E)
G) D) and E)

Question 10

How many protons and electrons are present in one Br- ion?

Accepted Answer

A)   35 protons, 35 electrons
B)   80 protons, 81 electrons
C)   35 protons, 34 electrons
D)   35 protons, 36 electrons
E)   80 protons, 34 electronsF) B) and E)
G) A) and C)

Question 11

How many total electrons are present in chloride ion?

Accepted Answer

A)   16
B)   17
C)   18
D)   19
E)   21F) None of the above
G) All of the above

Question 12

In 1864, the English chemist John Newlands noticed that when the elements were arranged in order of increasing atomic mass, every eighth element had similar properties. Newlands referred to this relationship as the

Accepted Answer

A)   law of periodicity.
B)   law of loopholes.
C)   law of octaves.
D)   law of orbitals.
E)   law of proportionality.F) A) and B)
G) A) and C)

Question 13

What is the definition of electron affinity?

Accepted Answer

The energy released (the negat...

Question 14

Explain why the trend in electron affinity increases in general as you move from left to right across a period (row) of the periodic table.

Accepted Answer

The trend in electron affinity is due to...

Question 15

In what groups are transition metals located?

Accepted Answer

A)   1A, 7A, and 1B
B)   2A, 4A, and 7A
C)   1B through 8B
D)   2B and 3B through 6B
E)   3A through 6AF) A) and E)
G) A) and B)

Question 16

Who noticed that the periodic table was arranged in order of atomic mass, where every eighth element had similar properties, and called this the law of octaves?

Accepted Answer

A)   Meyer
B)   Newlands
C)   Moseley
D)   Mendeleev
E)   ThomsonF) All of the above
G) B) and E)

Question 17

Which element in Group 6A has the highest electron affinity?

Accepted Answer

A)   O
B)   S
C)   Se
D)   Te
E)   PoF) None of the above
G) A) and B)

Question 18

Which of the species listed below is not isoelectronic with the others?

Accepted Answer

A)   O-
B)   F-
C)   Mg2+
D)   Na+
E)   N3-F) D) and E)
G) None of the above

Question 19

A sulfide ion, S2-, has

Accepted Answer

A)   16 protons and 16 electrons.
B)   32 protons and 16 electrons.
C)   16 protons and 14 electrons.
D)   16 protons and 18 electrons.
E)   32 protons and 18 electrons.F) C) and D)
G) A) and E)

Question 20

The energy states of atoms containing more than one electron arise from nucleus-electron and electron-electron 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) B) and E)
G) B) and D)

Exam 7: Electron Configuration and the Periodic Table

How many total electrons are present in chloride ion?

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In 1864, the English chemist John Newlands noticed that when the elements were arranged in order of increasing atomic mass, every eighth element had similar properties. Newlands referred to this relationship as the

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A sulfide ion, S2-, has

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Explain why the trend in electron affinity increases in general as you move from left to right across a period (row) of the periodic table.

Correct AnswerverifiedThe trend in electron affinity is due to...View AnswerShow Answer

Select the element with the greatest metallic character.

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What is the definition of electron affinity?

Correct AnswerverifiedThe energy released (the negat...View AnswerShow Answer

In what groups are transition metals located?

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The electron configuration of a cobalt(III) ion is

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

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How many protons and electrons are present in one Br- ion?

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Consider the set of isoelectronic atoms and ions A2-, B-, C, D+, and E2+. Which arrangement of relative radii is correct?

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Which ground-state ion does not have an electron configuration described by the following orbital diagram?

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Which species have the most similar atomic radii?

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Which of these elements has the greatest metallic character?

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Which of the species listed below is not isoelectronic with the others?

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What is the definition of nuclear charge, labeled Z?

Correct AnswerverifiedThe number...View AnswerShow Answer

Who noticed that the periodic table was arranged in order of atomic mass, where every eighth element had similar properties, and called this the law of octaves?

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If the radius of atom X is greater than the radius of atom Y, then it is also likely that

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Which element in Group 6A has the highest electron affinity?

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

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A sulfide ion, S^2-, has

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The trend in electron affinity is due to...
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The energy released (the negat...
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How many protons and electrons are present in one Br^- ion?

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Consider the set of isoelectronic atoms and ions A^2-, B^-, C, D⁺, and E²⁺. Which arrangement of relative radii is correct?

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The number...
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