Question 1

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) All of the above
G) A) and C)

Question 2

Which of these elements has the smallest first ionization energy?

Accepted Answer

A)  Cl
B)  Na
C)  Be
D)  K
E)  AsF) B) and D)
G) D) and E)

Question 3

Which two electron configurations represent elements that would have similar chemical properties? (1)  1s22s22p4,(2) 1s22s22p5,(3) [Ar]4s23d104p3,(4) [Ar]4s23d104p4

Accepted Answer

A)  (1) and (2) 
B)  (1) and (3) 
C)  (1) and (4) 
D)  (2) and (4) 
E)  (2) and (3) F) A) and B)
G) A) and C)

Question 4

Which of the following elements has the smallest atomic size?

Accepted Answer

A)  Na
B)  Ar
C)  K
D)  Ca
E)  KrF) A) and B)
G) A) and C)

Question 5

What is the definition of nuclear charge,labeled Z?

Accepted Answer

The number...

Question 6

The periodic table was first arranged according to increasing atomic masses.

Accepted Answer

A) True 
 B)False

Question 7

The electron affinity of oxygen is equal to

Accepted Answer

A)  the ionization energy of O-.
B)  the ionization energy of O2-.
C)  the second ionization energy of O.
D)  twice the electron affinity of O+.
E)  none of these.F) A) and B)
G) A) and C)

Question 8

A magnesium ion,Mg2+,has

Accepted Answer

A)  12 protons and 13 electrons.
B)  24 protons and 26 electrons.
C)  12 protons and 10 electrons.
D)  24 protons and 22 electrons.
E)  12 protons and 14 electrons.F) C) and E)
G) A) and D)

Question 9

How many total electrons are present in chloride ion?

Accepted Answer

A)  16
B)  17
C)  18
D)  19
E)  21F) B) and E)
G) C) and D)

Question 10

An oxide ion,O2-,has

Accepted Answer

A)  8 protons and 10 electrons.
B)  10 protons and 8 electrons.
C)  8 protons and 9 electrons.
D)  8 protons and 7 electrons.
E)  10 protons and 7 electrons.F) A) and B)
G) A) and E)

Question 11

Which pair of ions exhibits the greatest attractive force between them?

Accepted Answer

A)  Na+ and Cl-
B)  Ca2+ and Cl-
C)  Na+ and S2-
D)  Al3+ and Mg2+
E)  Mg2+ and O2-F) A) and B)
G) B) and D)

Question 12

Which of these species make an isoelectronic pair: Cl-,O2-,F,Ca2+,Fe3+?

Accepted Answer

A)  Ca2+ and Fe3+
B)  O2- and F
C)  F and Cl-
D)  Cl- and Ca2+
E)  None of the species are part of an isoelectronic series.F) A) and E)
G) A) and C)

Question 13

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) A) and D)
G) All of the above

Question 14

Which of the elements listed below has the greatest atomic radius?

Accepted Answer

A)  B
B)  Al
C)  S
D)  P
E)  SiF) B) and C)
G) None of the above

Question 15

Which of the following elements has the largest second ionization energy (IE2) ?

Accepted Answer

A)  Li
B)  B
C)  O
D)  F
E)  NaF) A) and D)
G) A) and C)

Question 16

Anions of Group 7A elements are isoelectronic with what group?

Accepted Answer

Noble gase...

Question 17

Which of these ground-state ions has unpaired electrons?

Accepted Answer

A)  P3-
B)  V5+
C)  Mg2+
D)  Sc2+
E)  S2-F) A) and D)
G) B) and E)

Question 18

The ionic radius is the distance between the nucleus and valence shell of an anion or cation.A cation is ___________ than the parent atom it belongs to and an anion is ____________ than the parent atom it belongs to.

Accepted Answer

The answer of The ionic radius is the distance between...

Question 19

The chief contribution of physicist Henry Moseley to atomic theory was

Accepted Answer

A)  the discovery of the periodic law.
B)  the determination of the charge of the proton.
C)  the measurement of the atomic numbers of the elements.
D)  the determination of the electric charge of the electron.
E)  the discovery of the law of octaves.F) B) and C)
G) A) and E)

Question 20

Which element in Group 7A has the smallest atomic radii?

Accepted Answer

A)  F
B)  Cl
C)  Br
D)  I
E)  AtF) C) and D)
G) D) and E)

Exam 7: Electron Configuration and the Periodic Table

The periodic table was first arranged according to increasing atomic masses.

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Anions of Group 7A elements are isoelectronic with what group?

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The ionic radius is the distance between the nucleus and valence shell of an anion or cation.A cation is ___________ than the parent atom it belongs to and an anion is ____________ than the parent atom it belongs to.

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A magnesium ion,Mg2+,has

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Which of these ground-state ions has unpaired electrons?

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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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The electron affinity of oxygen is equal to

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Which of these species make an isoelectronic pair: Cl-,O2-,F,Ca2+,Fe3+?

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Which of the elements listed below has the greatest atomic radius?

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Which two electron configurations represent elements that would have similar chemical properties? (1) 1s22s22p4,(2) 1s22s22p5,(3) [Ar]4s23d104p3,(4) [Ar]4s23d104p4

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What is the definition of nuclear charge,labeled Z?

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Which of the following elements has the largest second ionization energy (IE2) ?

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Which of these elements has the smallest first ionization energy?

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Which of the following elements has the smallest atomic size?

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An oxide ion,O2-,has

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Which pair of ions exhibits the greatest attractive force between them?

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Which element in Group 7A has the smallest atomic radii?

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

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How many total electrons are present in chloride ion?

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The chief contribution of physicist Henry Moseley to atomic theory was

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Noble gase...
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The ionic radius is the distance between the nucleus and valence shell of an anion or cation.A cation is _ than the parent atom it belongs to and an anion is __ than the parent atom it belongs to.

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A magnesium ion,Mg²⁺,has

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Which of these species make an isoelectronic pair: Cl^-,O^2-,F,Ca²⁺,Fe³⁺?

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Which two electron configurations represent elements that would have similar chemical properties? (1) 1s²2s²2p⁴,(2) 1s²2s²2p⁵,(3) [Ar]4s²3d¹⁰4p³,(4) [Ar]4s²3d¹⁰4p⁴

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The number...
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Which of the following elements has the largest second ionization energy (IE₂) ?

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An oxide ion,O^2-,has

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

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