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 
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

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

Accepted Answer

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

Question 3

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

Question 4

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

Question 5

Consider the following electron configurations to answer the questions that follow:
(i)1sS1U1P12S1S1P0 2sS1U1P12S1S1P0 2pS1U1P16S1S1P0 3sS1U1P11S1S1P0
(ii)1sS1U1P12S1S1P0 2sS1U1P12S1S1P0 2pS1U1P16S1S1P0 3sS1U1P12S1S1P0
(iii)1sS1U1P12S1S1P0 2sS1U1P12S1S1P0 2pS1U1P16S1S1P0 3sS1U1P12S1S1P0 3pS1U1P11S1S1P0
(iv)1sS1U1P12S1S1P0 2sS1U1P12S1S1P0 2pS1U1P16S1S1P0 3sS1U1P12S1S1P0 3pS1U1P14S1S1P0
(v)1sS1U1P12S1S1P0 2sS1U1P12S1S1P0 2pS1U1P16S1S1P0 3sS1U1P12S1S1P0 3pS1U1P15S1S1P0
-Of the following elements, ________ has the most negative electron affinity.

Accepted Answer

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

Question 6

Which one of the following atoms has the largest radius?

Accepted Answer

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

Question 7

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 
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 8

Which one of the following atoms has the largest radius?

Accepted Answer

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

Question 9

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

Accepted Answer

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

Question 10

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

Accepted Answer

A) True 
 B)False

Question 11

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. 
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 12

Electron affinity measures how easily an atom gains an electron.

Accepted Answer

A) True 
 B)False

Question 13

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 
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 14

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. 
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 15

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

Question 16

Write the balanced reaction between zinc oxide and sulfuric acid.

Accepted Answer

ZnO + H₂SO₄

Question 17

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

Accepted Answer

Cl₂ (g) + H

Question 18

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- 
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 19

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 
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 20

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

Exam 7: Periodic Properties of the Elements

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

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

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

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

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.

Which one of the following atoms has the largest radius?

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

Which one of the following atoms has the largest radius?

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

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

Which of the following statements is not true for oxygen?

Electron affinity measures how easily an atom gains an electron.

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

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

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

Write the balanced reaction between zinc oxide and sulfuric acid.

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

Which equation correctly represents the first ionization of phosphorous?

Which of the following traits characterizes the alkali metals?

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

Introduction: Matter and Measurement

Atoms, Molecules, and Ions

Stoichiometry: Calculations With Chemical Formulas and Equations

Aqueous Reactions and Solution Stoichiometry

Thermochemistry

Electronic Structure of Atoms

Basic Concepts of Chemical Bonding

Molecular Geometry and Bonding Theories

Gases

Liquids and Intermolecular Forces

Solids and Modern Materials

Properties of Solutions

Chemical Kinetics

Chemical Equilibrium

Acid-Base Equilibria

Additional Aspects of Aqueous Equilibria

Chemistry of the Environment

Chemical Thermodynamics

Electrochemistry

Nuclear Chemistry

Chemistry of the Nonmetals

Transition Metals and Coordination Chemistry

The Chemistry of Life: Organic and Biological Chemistry

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

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