Question 1

Screening of the nuclear charge by core electrons in atoms is ________.

Accepted Answer

A)  less efficient than that by valence electrons
B)  more efficient than that by valence electrons
C)  essentially identical to that by valence electrons
D)  responsible for a general decrease in atomic radius going down a group
E)  both essentially identical to that by valence electrons and responsible for a general decrease in atomic radius going down a group

Question 2

Write the balanced equation for the reaction of elemental chlorine with liquid water.

Accepted Answer

Cl₂ (g) + H...

Question 3

Consider the following electron configurations to answer the questions that follow:
(i) 1s2 2s2 2p6 3s1
(ii) 1s2 2s2 2p6 3s2
(iii) 1s2 2s2 2p6 3s2 3p1
(iv) 1s2 2s2 2p6 3s2 3p4
(v) 1s2 2s2 2p6 3s2 3p5
-Of the following elements, ________ has the most negative electron affinity.

Accepted Answer

A)  O
B)  K
C)  B
D)  Na
E)  S

Question 4

Write the balanced reaction between zinc oxide and sulfuric acid.

Accepted Answer

ZnO + H₂SO₄ ...

Question 5

Which one of the following atoms has the largest radius?

Accepted Answer

A)  As
B)  O
C)  Sn
D)  Cs
E)  Ca

Question 6

Which equation correctly represents the first ionization of phosphorous?

Accepted Answer

A)  P(g) → P+(g) + e-
B)  P+(g) → P2+(g) + e-
C)  P(g) → P-(g) + e-
D)  P+(g) + e- → P(g) 
E)  P2+(g) → P3+(g) + e-

Question 7

Bromine is much more apt to exist as an anion than is potassium. This is because ________.

Accepted Answer

A)  Bromine has a greater electron affinity than potassium does
B)  Bromine is bigger than potassium
C)  Bromine has a greater ionization energy than potassium does
D)  Bromine is a liquid and potassium is a solid
E)  Bromine is more metallic than potassium

Question 8

The element in the periodic table that looks like a metal, is a poor thermal conductor, and acts as an electrical semiconductor is ________.

Accepted Answer

A)  Sn
B)  B
C)  As
D)  Si
E)  Ge

Question 9

Which isoelectronic series is correctly arranged in order of increasing radius?

Accepted Answer

A)  K+ 2+ -
B)   + 2+ - 
B)     + 2+ 
C)  Ca2+ + - 
D)  Ca2+ + - 
E)  Ca2+ + -  + 2+
C)  Ca2+ + -
D)  Ca2+ + -
E)  Ca2+ + - < Ar

Question 10

Which of the following statements is not true for oxygen?

Accepted Answer

A)  The most stable allotrope of oxygen is O2.
B)  The chemical formula of ozone is O3.
C)  Dry air is about 79% oxygen.
D)  Oxygen forms peroxide and superoxide anions.
E)  Oxygen is a colorless gas at room temperature.

Question 11

What is the coefficient of H2O when the following equation is completed and balanced? Ba (s)  + H2O (l)  →

Accepted Answer

A)  1
B)  2
C)  3
D)  5
E)  Ba(s) does not react with H2O (l) .

Question 12

________ have the lowest first ionization energies of the groups listed.

Accepted Answer

A)  Alkali metals
B)  Transition elements
C)  Halogens
D)  Alkaline earth metals
E)  Noble gases

Question 13

Elements that readily conduct electricity are elements with low ionization energies.

Accepted Answer

A) True 
 B)False

Question 14

Which one of the following atoms has the largest radius?

Accepted Answer

A)  In
B)  Sn
C)  Sb
D)  Te
E)  I

Question 15

Astatine has a(n) ________ density and a(n) ________ atomic radius compared to iodine.

Accepted Answer

A)  greater; greater
B)  smaller; greater
C)  smaller; smaller
D)  greater; smaller
E)  equal; equal

Question 16

Electron affinity measures how easily an atom gains an electron.

Accepted Answer

A) True 
 B)False

Question 17

Which of the following traits characterizes the alkali metals?

Accepted Answer

A)  very high melting point
B)  existence as diatomic molecules
C)  formation of dianions
D)  the lowest first ionization energies in a period
E)  the smallest atomic radius in a period

Question 18

Of the following, which gives the correct order for atomic radius for Mg, Na, P, Si and Ar?

Accepted Answer

A)  Mg > Na > P > Si > Ar
B)  Ar > Si > P > Na > Mg
C)  Si > P > Ar > Na > Mg
D)  Na > Mg > Si > P > Ar
E)  Ar > P > Si > Mg > Na

Question 19

Alkali metals tend to be more reactive than alkaline earth metals because ________.

Accepted Answer

A)  alkali metals have lower densities
B)  alkali metals have lower melting points
C)  alkali metals have greater electron affinities
D)  alkali metals have lower ionization energies
E)  Alkali metals are not more reactive than alkaline earth metals.

Question 20

Of the following elements, ________ has the most negative electron affinity.

Accepted Answer

A)  F
B)  Cl
C)  Br
D)  H
E)  I

Exam 7: Periodic Properties of the Elements

Bromine is much more apt to exist as an anion than is potassium. This is because ________.

Correct Answer
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Screening of the nuclear charge by core electrons in atoms is ________.

Correct Answer
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Correct Answer
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Electron affinity measures how easily an atom gains an electron.

Correct Answer
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Write the balanced reaction between zinc oxide and sulfuric acid.

Correct Answer
verified
ZnO + H₂SO₄ ...
View Answer

Of the following elements, ________ has the most negative electron affinity.

Correct Answer
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What is the coefficient of H₂O when the following equation is completed and balanced? Ba (s) + H₂O (l) →

Correct Answer
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Of the following, which gives the correct order for atomic radius for Mg, Na, P, Si and Ar?

Correct Answer
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Which one of the following atoms has the largest radius?

Correct Answer
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________ have the lowest first ionization energies of the groups listed.

Correct Answer
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Which of the following statements is not true for oxygen?

Correct Answer
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Write the balanced equation for the reaction of elemental chlorine with liquid water.

Correct Answer
verified
Cl₂ (g) + H...
View Answer

Astatine has a(n) density and a(n) atomic radius compared to iodine.

Correct Answer
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Which equation correctly represents the first ionization of phosphorous?

Correct Answer
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The element in the periodic table that looks like a metal, is a poor thermal conductor, and acts as an electrical semiconductor is ________.

Correct Answer
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Elements that readily conduct electricity are elements with low ionization energies.

Correct Answer
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Which isoelectronic series is correctly arranged in order of increasing radius?

Correct Answer
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Alkali metals tend to be more reactive than alkaline earth metals because ________.

Correct Answer
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Which one of the following atoms has the largest radius?

Correct Answer
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Which of the following traits characterizes the alkali metals?

Correct Answer
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Exam 7: Periodic Properties of the Elements

Bromine is much more apt to exist as an anion than is potassium. This is because ________.

Correct AnswerverifiedShow Answer

Screening of the nuclear charge by core electrons in atoms is ________.

Correct AnswerverifiedShow Answer

Consider the following electron configurations to answer the questions that follow: (i) 1s2 2s2 2p6 3s1 (ii) 1s2 2s2 2p6 3s2 (iii) 1s2 2s2 2p6 3s2 3p1 (iv) 1s2 2s2 2p6 3s2 3p4 (v) 1s2 2s2 2p6 3s2 3p5 -Of the following elements, ________ has the most negative electron affinity.

Correct AnswerverifiedShow Answer

Electron affinity measures how easily an atom gains an electron.

Correct AnswerverifiedShow Answer

Write the balanced reaction between zinc oxide and sulfuric acid.

Correct AnswerverifiedZnO + H2SO4 ...View AnswerShow Answer

Of the following elements, ________ has the most negative electron affinity.

Correct AnswerverifiedShow Answer

What is the coefficient of H2O when the following equation is completed and balanced? Ba (s) + H2O (l) →

Correct AnswerverifiedShow Answer

Of the following, which gives the correct order for atomic radius for Mg, Na, P, Si and Ar?

Correct AnswerverifiedShow Answer

Which one of the following atoms has the largest radius?

Correct AnswerverifiedShow Answer

________ have the lowest first ionization energies of the groups listed.

Correct AnswerverifiedShow Answer

Which of the following statements is not true for oxygen?

Correct AnswerverifiedShow Answer

Write the balanced equation for the reaction of elemental chlorine with liquid water.

Correct AnswerverifiedCl2 (g) + H...View AnswerShow Answer

Astatine has a(n) ________ density and a(n) ________ atomic radius compared to iodine.

Correct AnswerverifiedShow Answer

Which equation correctly represents the first ionization of phosphorous?

Correct AnswerverifiedShow Answer

The element in the periodic table that looks like a metal, is a poor thermal conductor, and acts as an electrical semiconductor is ________.

Correct AnswerverifiedShow Answer

Elements that readily conduct electricity are elements with low ionization energies.

Correct AnswerverifiedShow Answer

Which isoelectronic series is correctly arranged in order of increasing radius?

Correct AnswerverifiedShow Answer

Alkali metals tend to be more reactive than alkaline earth metals because ________.

Correct AnswerverifiedShow Answer

Which one of the following atoms has the largest radius?

Correct AnswerverifiedShow Answer

Which of the following traits characterizes the alkali metals?

Correct AnswerverifiedShow Answer

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ZnO + H₂SO₄ ...
View Answer

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What is the coefficient of H₂O when the following equation is completed and balanced? Ba (s) + H₂O (l) →

Correct Answer
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Cl₂ (g) + H...
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Astatine has a(n) density and a(n) atomic radius compared to iodine.

Correct Answer
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