Question 1

Elements with ________ first ionization energies and ________ electron affinities generally form cations.

Accepted Answer

A)   low, very negative
B)   high, positive or slightly negative
C)   low, positive or slightly negative
D)   high, very negative
E)   None of these is generally correct.

Question 2

Which one of these ions is not isoelectronic with Kr?

Accepted Answer

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

Question 3

Which of these choices is the electron configuration for the chloride ion?

Accepted Answer

A)   [Ne]3s23p4
B)   [Ne]3s23p7
C)   [Ar]
D)   [Ar]4s1
E)   [Ne]3s23p5

Question 4

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.

Question 5

Arrange these ions in order of increasing ionic radius: K+, P3-, S2-, Cl-.

Accepted Answer

A)   K+ - 2- 3-
B)   K+ 3- 2- -
C)   P3- 2- - + 
D)   Cl- 2- 3- +
E)   Cl- 2- + 3-

Question 6

Select the element with the least metallic character.

Accepted Answer

A)   Sn
B)   Sr
C)   Tl
D)   Ge
E)   Ga

Question 7

Which of these pairs constitutes an isoelectronic pair?

Accepted Answer

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

Question 8

An isoelectronic series is

Accepted Answer

A)   a series that has two or more species that have identical nuclear charges, but have different electron configurations.
B)   a series that has the same ionization potentials.
C)   a series that can have only up to three species and have similar electron configuration and similar nuclear charges.
D)   a series that has two or more species that have identical electron configurations, but different nuclear charges.
E)   a series that has the same nuclear charge.

Question 9

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 10

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 11

Which of the following elements has the largest third ionization energy (IE3) ?

Accepted Answer

A)   Li
B)   B
C)   Ne
D)   Be
E)   Al

Question 12

What two 19th century scientists created the modern periodic table?

Accepted Answer

Dmitri Men...

Question 13

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

Accepted Answer

A) True 
 B)False

Question 14

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-

Question 15

Elements with ________ first ionization energies and ________ electron affinities generally form anions.

Accepted Answer

A)   low, very positive
B)   high, positive or slightly negative
C)   low, positive or slightly negative
D)   high, very positive
E)   None of these is generally correct.

Question 16

________ is the energy released when a single atom in the gas phase accepts an electron.

Accepted Answer

The answer of ________ is the energy released when a...

Question 17

Successive ionization energies, 1st, 2nd, 3rd, etc., provide evidence for the shell structure of the atom. For sulfur atoms, which ionization energy will show an exceptionally large increase over the preceding ionization energy?

Accepted Answer

A)   2nd
B)   3rd
C)   4th
D)   5th
E)   6th

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.

Question 19

Elements in which the outermost electron has the same principal quantum number, n, show similar chemical properties.

Accepted Answer

A) True 
 B)False

Question 20

How many valence electrons does a carbon atom have?

Accepted Answer

A)   1
B)   2
C)   3
D)   4
E)   6

Exam 7: Electron Configuration and the Periodic Table

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

Which of these pairs constitutes an isoelectronic pair?

Correct AnswerverifiedShow Answer

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

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

Which one of these ions is not isoelectronic with Kr?

Correct AnswerverifiedShow Answer

________ is the energy released when a single atom in the gas phase accepts an electron.

Correct AnswerverifiedShow Answer

An isoelectronic series is

Correct AnswerverifiedShow Answer

Arrange these ions in order of increasing ionic radius: K+, P3-, S2-, Cl-.

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Which of these choices is the electron configuration for the chloride ion?

Correct AnswerverifiedShow Answer

Elements with ________ first ionization energies and ________ electron affinities generally form anions.

Correct AnswerverifiedShow Answer

What two 19th century scientists created the modern periodic table?

Correct AnswerverifiedDmitri Men...View AnswerShow Answer

Select the element with the least metallic character.

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

Correct AnswerverifiedShow Answer

Elements with ________ first ionization energies and ________ electron affinities generally form cations.

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Elements in which the outermost electron has the same principal quantum number, n, show similar chemical properties.

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Which of the following elements has the largest third ionization energy (IE3) ?

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How many valence electrons does a carbon atom have?

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An aluminum ion, Al3+, has

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Successive ionization energies, 1st, 2nd, 3rd, etc., provide evidence for the shell structure of the atom. For sulfur atoms, which ionization energy will show an exceptionally large increase over the preceding ionization energy?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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Hydrogen is typically placed a...
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Arrange these ions in order of increasing ionic radius: K⁺, P^3-, S^2-, Cl^-.

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Elements with first ionization energies and electron affinities generally form anions.

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What two 19^th century scientists created the modern periodic table?

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Dmitri Men...
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Elements with first ionization energies and electron affinities generally form cations.

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Which of the following elements has the largest third ionization energy (IE₃) ?

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An aluminum ion, Al³⁺, has

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