Question 1

Which of the following statements about the effective nuclear charge, Zeff, is correct?

Accepted Answer

A)  Zeff increases with the size of the atom. 
B)  Zeff decreases across a period and increases down a group. 
C)  Zeff increases across a period and is relatively constant down a group. 
D)  Zeff increases as the value of the principal quantum number increases. 
E)  Zeff is greater for hydrogen than for any other element. 
A)  Zeff increases with the size of the atom. 
B)  Zeff decreases across a period and increases down a group. 
C)  Zeff increases across a period and is relatively constant down a group. 
D)  Zeff increases as the value of the principal quantum number increases. 
E)  Zeff is greater for hydrogen than for any other element.

Question 2

What is the stable form of the element sulfur, at room temperature?

Accepted Answer

A)  atomic sulfur 
B)  S2 
C)  S4 
D)  S6 
E)  S8 
A)  atomic sulfur 
B)  S2 
C)  S4 
D)  S6 
E)  S8

Question 3

The elements from Groups 1A(1) and 2A(2) are

Accepted Answer

A)  strong acids. 
B)  strong bases. 
C)  amphoteric. 
D)  strong oxidizing agents. 
E)  strong reducing agents. 
A)  strong acids. 
B)  strong bases. 
C)  amphoteric. 
D)  strong oxidizing agents. 
E)  strong reducing agents.

Question 4

The smallest ionization energies are found in the ____________ ___________ region of the periodic table.

Accepted Answer

A)  upper right 
B)  upper left 
C)  lower right 
D)  lower left 
E)  transition element (d-block) 
A)  upper right 
B)  upper left 
C)  lower right 
D)  lower left 
E)  transition element (d-block)

Question 5

Thallium can form two oxides, Tl2O and Tl2O3. Which will be the more basic substance?

Accepted Answer

A)  Tl2O 
B)  Tl2O3 
C)  They have the same strength as bases. 
D)  Neither compound has any acidic or basic properties. 
E)  More information is needed to make an accurate prediction. 
A)  Tl2O 
B)  Tl2O3 
C)  They have the same strength as bases. 
D)  Neither compound has any acidic or basic properties. 
E)  More information is needed to make an accurate prediction.

Question 6

Silicon halides have stronger bonds than corresponding carbon halides. Which of the following is a possible explanation of this phenomenon?

Accepted Answer

A)  The larger silicon atoms permit better overlap of its atomic orbitals with those of the halogens than the smaller carbons atoms do. 
B)  The large electronegativity difference between silicon and the halogens makes their bonds stronger than those of carbon. 
C)  Silicon has the ability to form a partial double bond with a halogen through the overlap of its d-orbital with a p-orbital of the halogen. 
D)  Silicon has a larger effective nuclear charge than carbon which allows it to bond more strongly to the more negative halogens than carbon. 
E)  Carbon-halogen bonds are unusually weak. 
A)  The larger silicon atoms permit better overlap of its atomic orbitals with those of the halogens than the smaller carbons atoms do. 
B)  The large electronegativity difference between silicon and the halogens makes their bonds stronger than those of carbon. 
C)  Silicon has the ability to form a partial double bond with a halogen through the overlap of its d-orbital with a p-orbital of the halogen. 
D)  Silicon has a larger effective nuclear charge than carbon which allows it to bond more strongly to the more negative halogens than carbon. 
E)  Carbon-halogen bonds are unusually weak.

Question 7

Which element forms compounds which are used to treat individuals suffering from manic-depressive disorders?

Accepted Answer

A)  fluorine 
B)  lithium 
C)  boron 
D)  beryllium 
E)  arsenic 
A)  fluorine 
B)  lithium 
C)  boron 
D)  beryllium 
E)  arsenic

Question 8

elements from Li to Cs?

Accepted Answer

A)  metallic character decreases 
B)  electronegativity increases 
C)  melting point increases 
D)  first ionization energy increases 
E)  chemical reactivity increases 
A)  metallic character decreases 
B)  electronegativity increases 
C)  melting point increases 
D)  first ionization energy increases 
E)  chemical reactivity increases

Question 9

Select the element with the lowest first ionization energy.

Accepted Answer

A)  Se 
B)  S 
C)  Sn 
D)  Sr 
E)  H 
A)  Se 
B)  S 
C)  Sn 
D)  Sr 
E)  H

Question 10

Certain Period 2 elements exhibit behaviors similar to Period 3 elements immediately below and to the right. One of these interesting diagonal relationships occurs between beryllium and aluminum. Which of the following is one of their differences?

Accepted Answer

A)  Some aluminum compounds and all beryllium compounds show significant covalent character in the gas phase. 
B)  Beryllium forms bridge bonds in its hydrides while aluminum does not. 
C)  Both form oxides that are impervious to reaction with water. 
D)  The cations for both strongly polarize nearby electron clouds. 
E)  Beryllium occurs in nature as the uncombined element, whereas aluminum does not. 
A)  Some aluminum compounds and all beryllium compounds show significant covalent character in the gas phase. 
B)  Beryllium forms bridge bonds in its hydrides while aluminum does not. 
C)  Both form oxides that are impervious to reaction with water. 
D)  The cations for both strongly polarize nearby electron clouds. 
E)  Beryllium occurs in nature as the uncombined element, whereas aluminum does not.

Question 11

Phosphoric acid (H3PO4) is a strong acid.

Accepted Answer

A) True 
 B)False

Which of the following statements about the effective nuclear charge, Z_eff, is correct?

What is the stable form of the element sulfur, at room temperature?

The elements from Groups 1A(1) and 2A(2) are

The smallest ionization energies are found in the __ _ region of the periodic table.

Thallium can form two oxides, Tl₂O and Tl₂O₃. Which will be the more basic substance?

Silicon halides have stronger bonds than corresponding carbon halides. Which of the following is a possible explanation of this phenomenon?

Which element forms compounds which are used to treat individuals suffering from manic-depressive disorders?

elements from Li to Cs?

Select the element with the lowest first ionization energy.

Certain Period 2 elements exhibit behaviors similar to Period 3 elements immediately below and to the right. One of these interesting diagonal relationships occurs between beryllium and aluminum. Which of the following is one of their differences?

Phosphoric acid (H₃PO₄) is a strong acid.

Keys to the Study of Chemistry

The Components of Matter

Stoichiometry of Formulas and Equations

Three Major Classes of Chemical Reactions

Gases and the Kinetic-Molecular Theory

Thermochemistry: Energy Flow and Chemical Change

Quantum Theory and Atomic Structure

Electron Configuration and Chemical Periodicity

Models of Chemical Bonding

The Shapes of Molecules

Theories of Covalent Bonding

Intermolecular Forces: Liquids, Solids, and Phase Changes

The Properties of Mixtures: Solutions and Colloids

Organic Compounds and the Atomic Properties of Carbon

Kinetics: Rates and Mechanisms of Chemical Reactions

Equilibrium: the Extent of Chemical Reactions

Acid-Base Equilibria

Ionic Equilibria in Aqueous Systems

Thermodynamics: Entropy, Free Energy, and the Direction of Chemical Reactions

Electrochemistry: Chemical Change and Electrical Work

The Elements in Nature and Industry

The Transition Elements and Their Coordination Compounds

Nuclear Reactions and Their Applications

Filters

Exam 14: Periodic Patterns in the Main-Group Elements

Which of the following statements about the effective nuclear charge, Zeff, is correct?

What is the stable form of the element sulfur, at room temperature?

The elements from Groups 1A(1) and 2A(2) are

The smallest ionization energies are found in the ____________ ___________ region of the periodic table.

Thallium can form two oxides, Tl2O and Tl2O3. Which will be the more basic substance?

Silicon halides have stronger bonds than corresponding carbon halides. Which of the following is a possible explanation of this phenomenon?

Which element forms compounds which are used to treat individuals suffering from manic-depressive disorders?

elements from Li to Cs?

Select the element with the lowest first ionization energy.

Certain Period 2 elements exhibit behaviors similar to Period 3 elements immediately below and to the right. One of these interesting diagonal relationships occurs between beryllium and aluminum. Which of the following is one of their differences?

Phosphoric acid (H3PO4) is a strong acid.

Keys to the Study of Chemistry

The Components of Matter

Stoichiometry of Formulas and Equations

Three Major Classes of Chemical Reactions

Gases and the Kinetic-Molecular Theory

Thermochemistry: Energy Flow and Chemical Change

Quantum Theory and Atomic Structure

Electron Configuration and Chemical Periodicity

Models of Chemical Bonding

The Shapes of Molecules

Theories of Covalent Bonding

Intermolecular Forces: Liquids, Solids, and Phase Changes

The Properties of Mixtures: Solutions and Colloids

Organic Compounds and the Atomic Properties of Carbon

Kinetics: Rates and Mechanisms of Chemical Reactions

Equilibrium: the Extent of Chemical Reactions

Acid-Base Equilibria

Ionic Equilibria in Aqueous Systems

Thermodynamics: Entropy, Free Energy, and the Direction of Chemical Reactions

Electrochemistry: Chemical Change and Electrical Work

The Elements in Nature and Industry

The Transition Elements and Their Coordination Compounds

Nuclear Reactions and Their Applications

Filters

Which of the following statements about the effective nuclear charge, Z_eff, is correct?

The smallest ionization energies are found in the __ _ region of the periodic table.

Thallium can form two oxides, Tl₂O and Tl₂O₃. Which will be the more basic substance?

Phosphoric acid (H₃PO₄) is a strong acid.