Question 1

Which one of the following is not isoelectronic with Kr?

Accepted Answer

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

Question 2

Which of the following elements has the greatest metallic character?

Accepted Answer

A)  Br
B)  F
C)  Ge
D)  Mn
E)  ScF) B) and D)
G) C) and D)

Question 3

Which of the following is a basic oxide?

Accepted Answer

A)  CO2
B)  CaO
C)  SO2
D)  H2O
E)  NO2F) C) and E)
G) A) and B)

Question 4

Consider the element with the electron configuration [Xe]6s24f7. This element is

Accepted Answer

A)  a representative element
B)  a lanthanide element
C)  a nonmetal
D)  an actinide element
E)  a noble gasF) A) and B)
G) B) and C)

Question 5

Which of the following elements has the greatest electron affinity (largest positive value) ?

Accepted Answer

A)  K
B)  Br
C)  As
D)  Ar
E)  IF) A) and C)
G) A) and B)

Question 6

Consider the following reaction: 3Li + Z  →\rarr→  Li3Z.What is the formula for the compound if we substitute magnesium for lithium?

Accepted Answer

A)  MgZ
B)  Mg2Z
C)  MgZ2
D)  Mg3Z
E)  Mg3Z2 F) A) and C)
G) D) and E)

Question 7

Which of the following is the electron configuration for the bromide ion?

Accepted Answer

A)  [Ar]
B)  [Ar]4s23d104p7
C)  [Kr]
D)  [Kr]5s24d105p7
E)  [Xe]F) None of the above
G) A) and B)

Question 8

Which one of the following elements is a transition element?

Accepted Answer

A)  antimony
B)  barium
C)  chromium
D)  potassium
E)  seleniumF) A) and C)
G) B) and D)

Question 9

Write the ground-state electron configuration for Ca2+.

Accepted Answer

Question 10

Which ion is isoelectronic with Ar?

Accepted Answer

A)  Fe2+
B)  F-
C)  Br-
D)  Ga3+
E)  Ca2+F) B) and E)
G) C) and D)

Question 11

The successive ionization energies of a certain element are I1 = 589.5 kJ/mol, I2 =1145 kJ/mol, I3= 4900 kJ/mol, I4 = 6500 kJ/mol, and I5 = 8100 kJ/mol. This pattern of ionization energies suggests that the unknown element is

Accepted Answer

A)  K
B)  Si
C)  As
D)  Ca
E)  SF) B) and E)
G) B) and D)

Question 12

Which pair of elements from different groups resemble each other the most in their chemical properties?

Accepted Answer

A)  Be and B
B)  Al and Si
C)  Li and Be
D)  Al and Be
E)  Be and CF) A) and D)
G) B) and E)

Question 13

How many valence electrons does an oxygen atom have?

Accepted Answer

A)  2
B)  4
C)  6
D)  7
E)  8F) C) and E)
G) A) and B)

Question 14

In a surprisingly large number of their properties, beryllium resembles aluminum and boron resembles silicon. Such a relationship is called

Accepted Answer

A)  amphoterism.
B)  an allotropic relationship.
C)  a diagonal relationship.
D)  the periodic law.
E)  an isoelectronic series.F) All of the above
G) C) and D)

Question 15

Which of the following elements behaves chemically similarly to calcium?

Accepted Answer

A)  magnesium
B)  sodium
C)  sulfur
D)  chlorine
E)  ironF) D) and E)
G) A) and D)

Question 16

Mendeleev proposed the existence of an unknown element that he called eka-aluminum.This element is now called

Accepted Answer

A)  gallium.
B)  silicon.
C)  magnesium.
D)  boron.
E)  germanium.F) C) and D)
G) All of the above

Question 17

The general electron configuration for atoms of the halogen group is

Accepted Answer

A)  ns2np6
B)  ns2np5
C)  ns2np6(n -1) d7
D)  ns1
E)  ns2np7F) A) and E)
G) A) and D)

Question 18

Write the ground-state electron configuration for Cr3+.

Accepted Answer

Question 19

How many valence electrons does a tin (Sn) atom have?

Accepted Answer

A)  2
B)  4
C)  14
D)  36
E)  50F) B) and E)
G) None of the above

Question 20

Since arsenic is a nonmetal, As2O3 is expected to be a/an _____ oxide.

Accepted Answer

A)  acidic
B)  ionic
C)  amphoteric
D)  neutral
E)  basicF) None of the above
G) B) and E)

Exam 8: Periodic Relationships Among the Elements

Write the ground-state electron configuration for Cr3+.

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Which one of the following is not isoelectronic with Kr?

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Which of the following is the electron configuration for the bromide ion?

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Which of the following elements has the greatest electron affinity (largest positive value) ?

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The successive ionization energies of a certain element are I1 = 589.5 kJ/mol, I2 =1145 kJ/mol, I3= 4900 kJ/mol, I4 = 6500 kJ/mol, and I5 = 8100 kJ/mol. This pattern of ionization energies suggests that the unknown element is

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Since arsenic is a nonmetal, As2O3 is expected to be a/an _____ oxide.

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Which of the following elements behaves chemically similarly to calcium?

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How many valence electrons does an oxygen atom have?

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Write the ground-state electron configuration for Ca2+.

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Which ion is isoelectronic with Ar?

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Which of the following elements has the greatest metallic character?

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How many valence electrons does a tin (Sn) atom have?

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Which pair of elements from different groups resemble each other the most in their chemical properties?

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Mendeleev proposed the existence of an unknown element that he called eka-aluminum.This element is now called

Correct AnswerverifiedShow Answer

Which of the following is a basic oxide?

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Which one of the following elements is a transition element?

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Consider the element with the electron configuration [Xe]6s24f7. This element is

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The general electron configuration for atoms of the halogen group is

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In a surprisingly large number of their properties, beryllium resembles aluminum and boron resembles silicon. Such a relationship is called

Correct AnswerverifiedShow Answer

Consider the following reaction: 3Li + Z →\rarr→ Li3Z.What is the formula for the compound if we substitute magnesium for lithium?

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Write the ground-state electron configuration for Cr³⁺.

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The successive ionization energies of a certain element are I₁= 589.5 kJ/mol, I₂=1145 kJ/mol, I₃= 4900 kJ/mol, I₄ = 6500 kJ/mol, and I₅ = 8100 kJ/mol. This pattern of ionization energies suggests that the unknown element is

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Since arsenic is a nonmetal, As₂O₃ is expected to be a/an _____ oxide.

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Write the ground-state electron configuration for Ca²⁺.

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Consider the element with the electron configuration [Xe]6s²4f⁷. This element is

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Consider the following reaction: 3Li + Z $\rarr$ Li₃Z.What is the formula for the compound if we substitute magnesium for lithium?

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