Question 1

Give an example of a molecular compound (a.k.a. a covalent compound).

Accepted Answer

Carbon dioxide, CO₂; answers will vary.

Question 2

A cation has a ________ charge, and an anion has a ________ charge.

Accepted Answer

positive ; negative

Question 3

Potassium is best described as a ________

Accepted Answer

A) metalloid. 
B) metal. 
C) transition metal. 
D) noble gas. 
E) nonmetal. 
A) metalloid. 
B) metal. 
C) transition metal. 
D) noble gas. 
E) nonmetal. B

Question 4

Cesium is an example of ________

Accepted Answer

A) an alkali metal. 
B) a transition metal. 
C) an alkaline earth metal. 
D) a halogen. 
E) a chalcogen. 
A) an alkali metal. 
B) a transition metal. 
C) an alkaline earth metal. 
D) a halogen. 
E) a chalcogen.

Question 5

Identify the letter that corresponds to each of the following groups of the periodic table:
a) chalcogens b) noble gases c) alkaline earth metals d) halogens

Accepted Answer

The answer of Identify the letter that corresponds to each...

Question 6

What is the chemical formula for manganese(IV) oxide?

Accepted Answer

The answer of What is the chemical formula for manganese(IV)...

Question 7

The 4He nucleus is an example of ________

Accepted Answer

A) a nuclide. 
B) a muon. 
C) a proton. 
D) a neutron. 
E) a nucleon. 
A) a nuclide. 
B) a muon. 
C) a proton. 
D) a neutron. 
E) a nucleon.

Question 8

Which of the following is most likely to exhibit covalent bonding?

Accepted Answer

A) NaF 
B) CaCl2 
C) Cs2O 
D) CO2 
E) NaCl 
A) NaF 
B) CaCl2 
C) Cs2O 
D) CO2 
E) NaCl

Question 9

According to the Big Bang theory, which statement about the origin of the elements is not correct?

Accepted Answer

A) Initially, energy was transformed into electrons and other elementary particles. 
B) As the universe cooled, neutrons and protons were formed. 
C) Collisions of neutrons and protons produced deuterons, which then led to the formation of alpha particles. 
D) The nuclides of the elements were formed by nuclear reactions in the interior of stars. 
E) These nuclear reactions all require the addition of energy to form the elements. 
A) Initially, energy was transformed into electrons and other elementary particles. 
B) As the universe cooled, neutrons and protons were formed. 
C) Collisions of neutrons and protons produced deuterons, which then led to the formation of alpha particles. 
D) The nuclides of the elements were formed by nuclear reactions in the interior of stars. 
E) These nuclear reactions all require the addition of energy to form the elements.

Question 10

What is the correct name for CuCl2?

Accepted Answer

Question 11

Manganese(IV) oxide is a brown insoluble solid often found as a product of reactions of potassium permanganate. What is the formula of manganese(IV) oxide?

Accepted Answer

A) Mn4O 
B) MnO4 
C) MnO 
D) MnO2 
E) Mn2O2 
A) Mn4O 
B) MnO4 
C) MnO 
D) MnO2 
E) Mn2O2

Question 12

What is the chemical formula for hydroselenic acid?

Accepted Answer

The answer of What is the chemical formula for hydroselenic...

Question 13

Give an example of a nonmetal.

Accepted Answer

Sulfur; an

Question 14

Heavy elements in the universe are formed by ________

Accepted Answer

A) fission reactions of hydrogen nuclei. 
B) quark formation. 
C) supernova explosions. 
D) star collapse into black holes. 
E) fusion reactions of iron nuclei. 
A) fission reactions of hydrogen nuclei. 
B) quark formation. 
C) supernova explosions. 
D) star collapse into black holes. 
E) fusion reactions of iron nuclei.

Question 15

Based on the element's position in the periodic table, which statement below is not correct?

Accepted Answer

A) The charge on an ion of sodium is 1+. 
B) The charge on an ion of magnesium is 2+. 
C) The charge on an ion of oxygen is 2-. 
D) The charge on an ion of chlorine is 1-. 
E) Ca2+ has more electrons than Ar. 
A) The charge on an ion of sodium is 1+. 
B) The charge on an ion of magnesium is 2+. 
C) The charge on an ion of oxygen is 2-. 
D) The charge on an ion of chlorine is 1-. 
E) Ca2+ has more electrons than Ar.

Question 16

Which particle-level diagram is the best representation of a   ion?

Accepted Answer

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

Question 17

Dalton's law of multiple proportions deals with ________

Accepted Answer

A) the proportions of reacting chemicals that maximize the reaction rate. 
B) the total number of different compounds that can be made from two elements. 
C) the volumes of two elements that can combine to form two or more compounds. 
D) the relative masses of two elements that can combine to form two or more compounds. 
E) reactions that involve multiple steps. 
A) the proportions of reacting chemicals that maximize the reaction rate. 
B) the total number of different compounds that can be made from two elements. 
C) the volumes of two elements that can combine to form two or more compounds. 
D) the relative masses of two elements that can combine to form two or more compounds. 
E) reactions that involve multiple steps.

Question 18

Elements 21-30 are known as ________

Accepted Answer

A) alkaline earths. 
B) chalcogens. 
C) halides. 
D) transition metals. 
E) rare earths. 
A) alkaline earths. 
B) chalcogens. 
C) halides. 
D) transition metals. 
E) rare earths.

Question 19

Titanium forms different ionic oxides. One, TiO2, is a white oxide used in paints. What is the proper name for TiO2?

Accepted Answer

A) titanium oxide 
B) titanium(IV) oxide 
C) titanium(II) oxide 
D) titanium oxide(II) 
E) titanium dioxide 
A) titanium oxide 
B) titanium(IV) oxide 
C) titanium(II) oxide 
D) titanium oxide(II) 
E) titanium dioxide

Question 20

What is the correct name for FeCl3?

Accepted Answer

A) iron(III) chloride 
B) iron trichloride 
C) ferrum trichloride 
D) ferric trichloride 
E) iron chloride 
A) iron(III) chloride 
B) iron trichloride 
C) ferrum trichloride 
D) ferric trichloride 
E) iron chloride

Exam 2: Atoms, Ions, and Molecules: Matter Starts Here

Give an example of a molecular compound (a.k.a. a covalent compound).

A cation has a ________ charge, and an anion has a ________ charge.

Potassium is best described as a ________

Cesium is an example of ________

Identify the letter that corresponds to each of the following groups of the periodic table: a) chalcogens b) noble gases c) alkaline earth metals d) halogens

What is the chemical formula for manganese(IV) oxide?

The 4He nucleus is an example of ________

Which of the following is most likely to exhibit covalent bonding?

According to the Big Bang theory, which statement about the origin of the elements is not correct?

What is the correct name for CuCl2?

Manganese(IV) oxide is a brown insoluble solid often found as a product of reactions of potassium permanganate. What is the formula of manganese(IV) oxide?

What is the chemical formula for hydroselenic acid?

Give an example of a nonmetal.

Heavy elements in the universe are formed by ________

Based on the element's position in the periodic table, which statement below is not correct?

Which particle-level diagram is the best representation of a ion?

Dalton's law of multiple proportions deals with ________

Elements 21-30 are known as ________

Titanium forms different ionic oxides. One, TiO2, is a white oxide used in paints. What is the proper name for TiO2?

What is the correct name for FeCl3?

Matter and Energy: The Origin of the Universe

Stoichiometry: Mass, Formulas, and Reactions

Solution Chemistry: The Hydrosphere

Thermochemistry: Energy Changes in Reactions

Properties of Gases: The Air We Breathe

A Quantum Model of Atoms: Waves and Particles

Chemical Bonds: What Makes a Gas a Greenhouse Gas

Molecular Geometry: Shape Determines Function

Intermolecular Forces: The Uniqueness of Water

Solutions: Properties and Behavior

Solids: Crystals, Alloys, and Polymers

Chemical Kinetics: Reactions in the Atmosphere

Chemical Equilibrium: How Much Product Does a Reaction Really Make

Acidbase Equilibria: Proton Transfer in Biological Systems

Additional Aqueous Equilibria: Chemistry and the Oceans

Thermodynamics: Spontaneous and Nonspontaneous Reactions and Processes

Electrochemistry: The Quest for Clean Energy

Nuclear Chemistry: Applications to Energy and Medicine

Organic and Biological Molecules: the Compounds of Life

The Main Group Elements: Life and the Periodic Table

Transition Metals: Biological and Medical Applications

Filters

A cation has a charge, and an anion has a charge.

The ⁴He nucleus is an example of ________

What is the correct name for CuCl₂?

Titanium forms different ionic oxides. One, TiO₂, is a white oxide used in paints. What is the proper name for TiO₂?

What is the correct name for FeCl₃?