Question 1

What is the name for the group of elements indicated by the shaded portion of the periodic table?

Accepted Answer

A) alkali metals 
B) alkaline earth metals 
C) inner-transition metals 
D) transition metals 
A) alkali metals 
B) alkaline earth metals 
C) inner-transition metals 
D) transition metals A

Question 2

What statement is not characteristic about group 6A elements?

Accepted Answer

A) Oxygen,sulfur,and selenium are typical nonmetals while tellurium is a semi-metal. 
B) Oxygen is a powerful oxidizing agent but H2Se and H2Te are good reducing agents. 
C) S,Se,and Te are much less electronegative than oxygen and commonly have positive oxidation states. 
D) The favored oxidation state of Te and Po is +2. 
A) Oxygen,sulfur,and selenium are typical nonmetals while tellurium is a semi-metal. 
B) Oxygen is a powerful oxidizing agent but H2Se and H2Te are good reducing agents. 
C) S,Se,and Te are much less electronegative than oxygen and commonly have positive oxidation states. 
D) The favored oxidation state of Te and Po is +2. D

Question 3

Which alkali metal forms preferentially a peroxide or superoxide?

Accepted Answer

A) Li 
B) Na 
C) Cs 
D) Sr 
A) Li 
B) Na 
C) Cs 
D) Sr C

Question 4

What are the molecular structures of orthophosphoric acid and pyrophosphoric acid?

Accepted Answer

A) 1 and 2 
B) 1 and 3 
C) 2 and 3 
D) 3 and 4 
A) 1 and 2 
B) 1 and 3 
C) 2 and 3 
D) 3 and 4

Question 5

Why is H3PO4 a weak triprotic acid whereas H3PO3 is a weak diprotic acid?

Accepted Answer

All three protons in H₃PO₄ are bonded to o

Question 6

Which one of the following elements forms the strongest π-bonds?

Accepted Answer

A) C 
B) P 
C) Mg 
D) Li 
A) C 
B) P 
C) Mg 
D) Li

Question 7

What are the products of the reaction of chlorine gas with hot aqueous sodium hydroxide?

Accepted Answer

A) Cl- and H2O 
B) ClO3- and H2O 
C) Cl- and ClO3- 
D) Cl-,ClO3- and H2O 
A) Cl- and H2O 
B) ClO3- and H2O 
C) Cl- and ClO3- 
D) Cl-,ClO3- and H2O

Question 8

Which of the group 3A elements is the only one to readily form a +1 ion?

Accepted Answer

A) B 
B) Al 
C) In 
D) Tl 
A) B 
B) Al 
C) In 
D) Tl

Question 9

The two-dimensional layer silicate ion shown in the picture below combines with magnesium and hydroxide ions to form talc.What is the formula and charge of the repeating unit of the silicate ion?

Accepted Answer

A) SiO32- 
B) Si4O104- 
C) Si6O156- 
D) Si18O5028- 
A) SiO32- 
B) Si4O104- 
C) Si6O156- 
D) Si18O5028-

Question 10

What is the formula and charge of the silicate anion represented by the picture below?

Accepted Answer

A) SiO32- 
B) SiO44- 
C) Si2O63- 
D) Si2O76- 
A) SiO32- 
B) SiO44- 
C) Si2O63- 
D) Si2O76-

Question 11

When a person exhales through a straw into water,the water will have a(n)________ pH due to the reaction ________.

Accepted Answer

acidic,CO₂(

Question 12

In which compound is nitrogen in its lowest possible oxidation state?

Accepted Answer

A) NH3 
B) N2H4 
C) HNO2 
D) HNO3 
A) NH3 
B) N2H4 
C) HNO2 
D) HNO3

Question 13

What is the hybridization of boron in diborane B2H6?

Accepted Answer

A) sp 
B) sp2 
C) sp3 
D) None of these 
A) sp 
B) sp2 
C) sp3 
D) None of these

Question 14

What is the chemical formula of "fool's gold"?

Accepted Answer

A) cinnabar,HgS 
B) galena,PbS 
C) gypsum,CaSO4↔2H2O 
D) pyrite,FeS2 
A) cinnabar,HgS 
B) galena,PbS 
C) gypsum,CaSO4↔2H2O 
D) pyrite,FeS2

Question 15

Which of the following is not a use of aluminum?

Accepted Answer

A) soda cans 
B) cooking pots 
C) cooking utensils 
D) plastic bottles 
A) soda cans 
B) cooking pots 
C) cooking utensils 
D) plastic bottles

Question 16

Which of the following is a peroxide?

Accepted Answer

A) Li2O 
B) K2O2 
C) CaO 
D) CsO2 
A) Li2O 
B) K2O2 
C) CaO 
D) CsO2

Question 17

One of the group 3A elements is extremely toxic due to the similarities in chemistry of one of its ions to alkali metal chemistry.Which element is it?

Accepted Answer

A) B 
B) Ga 
C) In 
D) Tl 
A) B 
B) Ga 
C) In 
D) Tl

Question 18

Identify a Group 2A element with the smallest radius.

Accepted Answer

A) Na 
B) Ca 
C) Sr 
D) F 
A) Na 
B) Ca 
C) Sr 
D) F

Question 19

-Which of the elements indicated on the above periodic table is a group 4A element that is a semiconductor?

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 20

What is the geometric structure of BF3 and the hybridization of the B atom?

Accepted Answer

A) trigonal planar and sp2 hybridization 
B) trigonal planar and sp3 hybridization 
C) pyramidal and sp  hybridization 
D) tetrahedral and sp2 hybridization 
A) trigonal planar and sp2 hybridization 
B) trigonal planar and sp3 hybridization 
C) pyramidal and sp  hybridization 
D) tetrahedral and sp2 hybridization

Exam 22: The Main-Group Elements

What is the name for the group of elements indicated by the shaded portion of the periodic table?

What statement is not characteristic about group 6A elements?

Which alkali metal forms preferentially a peroxide or superoxide?

What are the molecular structures of orthophosphoric acid and pyrophosphoric acid?

Why is H3PO4 a weak triprotic acid whereas H3PO3 is a weak diprotic acid?

Which one of the following elements forms the strongest π-bonds?

What are the products of the reaction of chlorine gas with hot aqueous sodium hydroxide?

Which of the group 3A elements is the only one to readily form a +1 ion?

The two-dimensional layer silicate ion shown in the picture below combines with magnesium and hydroxide ions to form talc.What is the formula and charge of the repeating unit of the silicate ion?

What is the formula and charge of the silicate anion represented by the picture below?

When a person exhales through a straw into water,the water will have a(n)________ pH due to the reaction ________.

In which compound is nitrogen in its lowest possible oxidation state?

What is the hybridization of boron in diborane B2H6?

What is the chemical formula of "fool's gold"?

Which of the following is not a use of aluminum?

Which of the following is a peroxide?

One of the group 3A elements is extremely toxic due to the similarities in chemistry of one of its ions to alkali metal chemistry.Which element is it?

Identify a Group 2A element with the smallest radius.

-Which of the elements indicated on the above periodic table is a group 4A element that is a semiconductor?

What is the geometric structure of BF3 and the hybridization of the B atom?

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

Why is H₃PO₄ a weak triprotic acid whereas H₃PO₃ is a weak diprotic acid?

When a person exhales through a straw into water,the water will have a(n) pH due to the reaction .

What is the hybridization of boron in diborane B₂H₆?

What is the geometric structure of BF₃ and the hybridization of the B atom?