Question 1

Can metal atoms form negative ions in the gaseous state? Explain.

Accepted Answer

A)   No, an electron cannot be added.
B)   No, only a liquid can be ionized.
C)   Yes, electrons can be added to a Li half-filled 2s orbital.
D)   Yes, electrons can be removed from a Li half-filled 2s orbital.
E)   No, the 2s orbital is completely filled.

Question 2

Which comparison of ionization energies is correct?

Accepted Answer

A)   Cs > Na
B)   Na > Mg
C)   Ca > Mg
D)   Ca+ > Ca
E)   Ar > He

Question 3

Which of the following has the smallest second ionization energy?

Accepted Answer

A)   Si
B)   Mg
C)   Al
D)   P

Question 4

The electron affinity is opposite to the ionization energy.

Accepted Answer

A) True 
 B)False

Question 5

Which species is diamagnetic?

Accepted Answer

A)   atomic sodium
B)   atomic fluorine
C)   iron(III)  ion
D)   calcium(II)  ion
E)   cobalt(II)  ion

Question 6

Which of the following has the most unpaired electrons: Na, Mn2+, S, N, Ar?

Accepted Answer

A)   Na
B)   Mn2+
C)   S
D)   N
E)   Ar

Question 7

List in order of more negative electron affinity: F, Br, Sb, Rb, Se. (more positive → more negative)

Accepted Answer

A)   Br 
B)   Se 
C)   Sb 
D)   Br 
E)   Rb < Sb < Se < Br < F

Question 8

List in order of increasing atomic size: F, Na, K, Mg, Ne.

Accepted Answer

A)   K 
B)   Ne 
C)   Ne 
D)   Mg 
E)   K < Na < Mg < F < Ne

Question 9

What is the general electronic configuration (where n = principal quantum number)  that best describes the halogens as a group?

Accepted Answer

A)   ns1np6
B)   ns2np4
C)   ns2sp5
D)   ns2np6
E)   ns2np3

Question 10

Which would you expect to have the highest melting point?

Accepted Answer

A)   CF4
B)   HI
C)   HCl
D)   HBr
E)   All have the same melting point.

Question 11

Which of the following atoms has the smallest atomic radius: Br, K, Fe, Cu, Bi?

Accepted Answer

A)   Br
B)   K
C)   Fe
D)   Cu
E)   Bi

Question 12

Which 1+ ion is isoelectronic with S2-?

Accepted Answer

Question 13

Arrange the following elements in order of increasing metallic character: Al, Pt, Cd.

Accepted Answer

A)   Cd 
B)   Al 
C)   Al 
D)   Cd 
E)   Pt < Cd < Al

Question 14

Which of the following is an amphoteric oxide?

Accepted Answer

A)   Al2O3
B)   Li2O
C)   PO3
D)   Sc2O3
E)   SrO

Question 15

Which of the following has the smallest radius?

Accepted Answer

A)   Yb3+
B)   Ho3+
C)   Nd3+
D)   Gd3+
E)   Ce3+

Question 16

List in order of increasing number of unpaired electrons: N, Na, Si, Cr, Ar.

Accepted Answer

A)   Cr 
B)   Ar 
C)   Ar 
D)   N 
E)   Ar < Na < Si < N < Cr

Question 17

List in order of increasing atomic size: Sr, Se, Cs, Ga, In.

Accepted Answer

A)   Se 
B)   Ga 
C)   Sr 
D)   In 
E)   Cs < Ga < Se < Sr < In

Question 18

Which of the following has the largest radius?

Accepted Answer

A)   Cl-
B)   Ar
C)   Sc3+
D)   K+
E)   P3-

Question 19

Which of the following has the largest radius?

Accepted Answer

A)   Se2-
B)   Kr
C)   Rb+
D)   Br-
E)   Y3+

Question 20

List in order of increasing size: Cl-, Ar, K+, S2-, Ca2+.

Accepted Answer

A)   Ca2+ + - 2-
B)   S2- - + 2+
C)   Ca2+ 2- + -
D)   Cl- + 2- 2+
E)   K+ 2- - 2+

Exam 9: The Periodic Table and Some Atomic Properties

Which of the following has the largest radius?

Correct AnswerverifiedShow Answer

What is the general electronic configuration (where n = principal quantum number) that best describes the halogens as a group?

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List in order of increasing number of unpaired electrons: N, Na, Si, Cr, Ar.

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List in order of increasing atomic size: Sr, Se, Cs, Ga, In.

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Which of the following is an amphoteric oxide?

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Which of the following has the most unpaired electrons: Na, Mn2+, S, N, Ar?

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Which would you expect to have the highest melting point?

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Which of the following atoms has the smallest atomic radius: Br, K, Fe, Cu, Bi?

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Arrange the following elements in order of increasing metallic character: Al, Pt, Cd.

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The electron affinity is opposite to the ionization energy.

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Which species is diamagnetic?

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Which comparison of ionization energies is correct?

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List in order of more negative electron affinity: F, Br, Sb, Rb, Se. (more positive → more negative)

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Which of the following has the smallest second ionization energy?

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List in order of increasing size: Cl-, Ar, K+, S2-, Ca2+.

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List in order of increasing atomic size: F, Na, K, Mg, Ne.

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Which 1+ ion is isoelectronic with S2-?

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Can metal atoms form negative ions in the gaseous state? Explain.

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Which of the following has the smallest radius?

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Which of the following has the largest radius?

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Which of the following has the most unpaired electrons: Na, Mn²⁺, S, N, Ar?

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List in order of increasing size: Cl^-, Ar, K⁺, S^{2^-}, Ca^2⁺.

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Which 1+ ion is isoelectronic with S^2-?

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