Question 1

Which one of the following binary oxides is the most basic?

Accepted Answer

A) B2O3 
B) Al2O3 
C) Ga2O3 
D) In2O3 
A) B2O3 
B) Al2O3 
C) Ga2O3 
D) In2O3

Question 2

-Which element indicated on the above periodic tableforms a binary hydride with molecular structure (3)shown above?

Accepted Answer

A) element A 
B) element B 
C) element C 
D) element D 
A) element A 
B) element B 
C) element C 
D) element D

Question 3

Which group 6A element has the most negative electron affinity?

Accepted Answer

A) Te 
B) S 
C) N 
D) C 
A) Te 
B) S 
C) N 
D) C

Question 4

Which allotrope of carbon has the atoms arranged in a spherical array?

Accepted Answer

A) coke 
B) diamond 
C) fullerene 
D) graphite 
A) coke 
B) diamond 
C) fullerene 
D) graphite

Question 5

The strongest homonuclear single bond is

Accepted Answer

A) H-H 
B) Ge-Ge 
C) As-As 
D) I-I 
A) H-H 
B) Ge-Ge 
C) As-As 
D) I-I

Question 6

Which alkaline earth metal reacts the most vigorously with water at room temperature?

Accepted Answer

A) Rb 
B) Mg 
C) Ba 
D) Lr 
A) Rb 
B) Mg 
C) Ba 
D) Lr

Question 7

Each of the pictures (a)-(d)represents one of the following substances at 25°C: potassium,fluorine,iodine,potassium fluoride,not necessarily in that order.  
-Which picture corresponds to potassium fluoride?

Accepted Answer

A) picture (a) 
B) picture (b) 
C) picture (c) 
D) picture (d) 
A) picture (a) 
B) picture (b) 
C) picture (c) 
D) picture (d)

Question 8

Which one of the following compounds contains a three-center,two electron (3c-2e)bond?

Accepted Answer

A) B2H6 
B) C2H4 
C) N2H4 
D) H2O2 
A) B2H6 
B) C2H4 
C) N2H4 
D) H2O2

Question 9

Which of the following chlorides is the most ionic?

Accepted Answer

A) CH2Cl2 
B) SiCl4 
C) PbCl2 
D) PbCl4 
A) CH2Cl2 
B) SiCl4 
C) PbCl2 
D) PbCl4

Question 10

When sodium metal is heated in excess oxygen it tends to form

Accepted Answer

A) an oxide. 
B) a peroxide. 
C) a superoxide. 
D) an oxide and a superoxide. 
A) an oxide. 
B) a peroxide. 
C) a superoxide. 
D) an oxide and a superoxide.

Question 11

What is the geometric structure of P4 molecules?

Accepted Answer

A) linear 
B) rectangular 
C) square planar 
D) tetrahedral 
A) linear 
B) rectangular 
C) square planar 
D) tetrahedral

Question 12

-Which element indicated on the above periodic table forms a binary oxide with molecular structure (3)shown above?

Accepted Answer

A) element A 
B) element B 
C) element C 
D) element D 
A) element A 
B) element B 
C) element C 
D) element D

Question 13

The increased viscosity of molten sulfur at 160-195°C is due to the

Accepted Answer

A) melting of S8 to give discrete S8 units. 
B) merging of the S8 rings to give interlocking S8 rings. 
C) opening of the S8 rings to give smaller S units. 
D) opening of the S8 rings which then polymerize into long chains. 
A) melting of S8 to give discrete S8 units. 
B) merging of the S8 rings to give interlocking S8 rings. 
C) opening of the S8 rings to give smaller S units. 
D) opening of the S8 rings which then polymerize into long chains.

Question 14

-What group of elements is most likely to form covalent molecular hydrides?

Accepted Answer

A) A 
B) B 
C) C 
D) D 
A) A 
B) B 
C) C 
D) D

Question 15

Which group 6A element is naturally radioactive?

Accepted Answer

A) S 
B) U 
C) Dy 
D) Po 
A) S 
B) U 
C) Dy 
D) Po

Question 16

Which one of the following binary oxides is the most acidic?

Accepted Answer

A) K2O 
B) Ga2O3 
C) BeO 
D) Cl2O7 
A) K2O 
B) Ga2O3 
C) BeO 
D) Cl2O7

Question 17

What is the oxidation number of oxygen in BaO2?

Accepted Answer

A) 0 
B) -1/2 
C) -1 
D) -2 
A) 0 
B) -1/2 
C) -1 
D) -2

Question 18

-What group of elements is most likely to from ionic hydrides of the type MH2?

Accepted Answer

A) A 
B) B 
C) C 
D) D 
A) A 
B) B 
C) C 
D) D

Question 19

Wollastonite,CaSiO3,is an example of a(n)________ silicate.

Accepted Answer

Question 20

Electronegativity of main-group elements generally

Accepted Answer

A) increases from left to right across a period and increases down a group. 
B) increases from left to right across a period and decreases down a group. 
C) decreases from left to right across a period and increases down a group. 
D) decreases from left to right across a period and decreases down a group. 
A) increases from left to right across a period and increases down a group. 
B) increases from left to right across a period and decreases down a group. 
C) decreases from left to right across a period and increases down a group. 
D) decreases from left to right across a period and decreases down a group.

Exam 22: The Main-Group Elements

Which one of the following binary oxides is the most basic?

-Which element indicated on the above periodic tableforms a binary hydride with molecular structure (3)shown above?

Which group 6A element has the most negative electron affinity?

Which allotrope of carbon has the atoms arranged in a spherical array?

The strongest homonuclear single bond is

Which alkaline earth metal reacts the most vigorously with water at room temperature?

Each of the pictures (a)-(d)represents one of the following substances at 25°C: potassium,fluorine,iodine,potassium fluoride,not necessarily in that order. -Which picture corresponds to potassium fluoride?

Which one of the following compounds contains a three-center,two electron (3c-2e)bond?

Which of the following chlorides is the most ionic?

When sodium metal is heated in excess oxygen it tends to form

What is the geometric structure of P4 molecules?

-Which element indicated on the above periodic table forms a binary oxide with molecular structure (3)shown above?

The increased viscosity of molten sulfur at 160-195°C is due to the

-What group of elements is most likely to form covalent molecular hydrides?

Which group 6A element is naturally radioactive?

Which one of the following binary oxides is the most acidic?

What is the oxidation number of oxygen in BaO2?

-What group of elements is most likely to from ionic hydrides of the type MH2?

Wollastonite,CaSiO3,is an example of a(n)________ silicate.

Electronegativity of main-group elements generally

Chemical Tools: Experimentation and Measurement

Atoms, molecules, and Ions

Mass Relationships in Chemical Reactions

Reactions in Aqueous Solutions

Periodicity and the Electronic Structure of Atoms

Ionic Compounds: Periodic Trends and Bonding

Covalent Bonding and Electron-Dot Structures

Covalent Compounds: Bonding Theories and Molecular Structure

Thermochemistry: Chemical Energy

Gases: Their Properties and Behavior

Liquids, solids, and Phase Changes

Solutions and Their Properties

Chemical Kinetics

Chemical Equilibrium

Aqueous Equilibria: Acids and Bases

Applications of Aqueous Equilibria

Thermodynamics: Entropy, free Energy, and Equilibrium

Electrochemistry

Nuclear Chemistry

Transition Elements and Coordination Chemistry

Metals and Solid-State Materials

Connections to Organic and Biological Chemistry

Filters

What is the geometric structure of P₄ molecules?

What is the oxidation number of oxygen in BaO₂?

-What group of elements is most likely to from ionic hydrides of the type MH₂?

Wollastonite,CaSiO₃,is an example of a(n)________ silicate.