Question 1

He is the symbol for ________

Accepted Answer

A) hydrogen. 
B) hafnium. 
C) mercury. 
D) helium. 
E) holmium. 
A) hydrogen. 
B) hafnium. 
C) mercury. 
D) helium. 
E) holmium.

Question 2

The average atomic mass of zinc is 65.39 amu. Given the data in the following table, what is the natural abundance of 66Zn? Isotope
Mass (amu)
Natural Abundance (%)
64Zn
63)9291
48)89
66Zn
65)9260
?
67Zn
66)9271
4)11
68Zn
67)9249
18)56
70Zn
69)9253
0)62

Accepted Answer

A) 27.83% 
B) 0.2783% 
C) 50.00% 
D) 2.783% 
E) 28.73% 
A) 27.83% 
B) 0.2783% 
C) 50.00% 
D) 2.783% 
E) 28.73%

Question 3

Provide the number of protons, neutrons, and electrons in a silicon-29 isotope.

Accepted Answer

14 protons

Question 4

Which anion is not labeled correctly?

Accepted Answer

A) NO2-nitrite 
B) SO42- sulfate 
C) Br- bromide 
D) SO32- sulfite 
E) All are labeled correctly. 
A) NO2-nitrite 
B) SO42- sulfate 
C) Br- bromide 
D) SO32- sulfite 
E) All are labeled correctly.

Question 5

A   Mn2+ ion has ________ protons, ________ neutrons, and ________electrons.

Accepted Answer

A) 23; 30; 25 
B) 25; 30; 23 
C) 30; 25; 23 
D) 25; 30; 25 
E) 30; 25; 30 
A) 23; 30; 25 
B) 25; 30; 23 
C) 30; 25; 23 
D) 25; 30; 25 
E) 30; 25; 30

Question 6

The Rutherford-Geiger-Marsden gold foil experiments paved the way for the nuclear model of the atom, replacing ________ of the atom.

Accepted Answer

A) the quantum mechanical model 
B) Dalton's theory 
C) Avogadro's law 
D) the plum-pudding model 
E) Einstein's relativistic theory 
A) the quantum mechanical model 
B) Dalton's theory 
C) Avogadro's law 
D) the plum-pudding model 
E) Einstein's relativistic theory

Question 7

A hypothetical element has two stable isotopes: one isotope has a mass of 106.9051 amu with an abundance of 48.183%, the other isotope has a mass of 108.9048 amu with an abundance of 51.825%. What is the average atomic mass of this element?

Accepted Answer

A) 107.980 amu 
B) 107.970 amu 
C) 107.960 amu 
D) 107.950 amu 
E) 107.940 amu 
A) 107.980 amu 
B) 107.970 amu 
C) 107.960 amu 
D) 107.950 amu 
E) 107.940 amu

Question 8

Identify the binary compound that has ionic bonding.

Accepted Answer

A) H2O 
B) NO 
C) LiF 
D) CH4 
E) CF4 
A) H2O 
B) NO 
C) LiF 
D) CH4 
E) CF4

Question 9

When 10.0 g of sulfur is combined with 10.0 g of oxygen, 20.0 g of sulfur dioxide is formed. What mass of oxygen would be required to convert 10.0 g of sulfur into sulfur trioxide?

Accepted Answer

A) 5.0 g 
B) 10 g 
C) 15 g 
D) 30 g 
E) 20 g 
A) 5.0 g 
B) 10 g 
C) 15 g 
D) 30 g 
E) 20 g

Question 10

What is the correct symbol for an alpha particle?

Accepted Answer

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

Question 11

Sodium nitrite, which is used in meat processing, has been implicated as a possible health hazard because it can react with amines present in meat to form trace quantities of carcinogenic nitrosamines. What is the formula of sodium nitrite?

Accepted Answer

A) Na2NO3 
B) NaNO2 
C) NaNO3 
D) Na2NO4 
E) Na2NO2 
A) Na2NO3 
B) NaNO2 
C) NaNO3 
D) Na2NO4 
E) Na2NO2

Question 12

What is the correct symbol for an electron?

Accepted Answer

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

Question 13

Active metals often form a protective oxide surface film that prevents further reaction of the metal with oxygen in the air. Which one of the following formulas for the metal oxide is not correct?

Accepted Answer

A) Al2O3 is aluminum oxide. 
B) Fe2O3 is iron(III) oxide. 
C) Na2O is sodium oxide. 
D) MgO2 is magnesium oxide. 
E) FeO is iron(II) oxide. 
A) Al2O3 is aluminum oxide. 
B) Fe2O3 is iron(III) oxide. 
C) Na2O is sodium oxide. 
D) MgO2 is magnesium oxide. 
E) FeO is iron(II) oxide.

Question 14

What is the correct name for the acid HNO2?

Accepted Answer

Question 15

Zinc oxide is found in ointments for the skin. What formula best describes this compound, which has Zn as a doubly charged cation?

Accepted Answer

A) ZnO 
B) Zn2O 
C) ZnO2 
D) Zn2O2 
E) Zn2O3 
A) ZnO 
B) Zn2O 
C) ZnO2 
D) Zn2O2 
E) Zn2O3

Question 16

Based on its position in the periodic table, which atom would you predict to form an ionic compound with two bromine atoms?

Accepted Answer

A) sodium 
B) aluminum 
C) lithium 
D) calcium 
E) carbon 
A) sodium 
B) aluminum 
C) lithium 
D) calcium 
E) carbon

Question 17

What is the correct symbol for a neutron?

Accepted Answer

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

Question 18

Which of the following is an alkaline earth metal?

Accepted Answer

A) K 
B) Mg 
C) Al 
D) Cu 
E) Na 
A) K 
B) Mg 
C) Al 
D) Cu 
E) Na

Question 19

Who was the first scientist to determine the charge of an electron?

Accepted Answer

A) Robert Boyle 
B) Robert Millikan 
C) Joseph John Thomson 
D) John Dalton 
E) Albert Einstein 
A) Robert Boyle 
B) Robert Millikan 
C) Joseph John Thomson 
D) John Dalton 
E) Albert Einstein

Question 20

Which of the following molecular compounds has an incorrect formula or is not named correctly?

Accepted Answer

A) CCl4, carbon tetrachloride 
B) P2N5, phosphorus pentanitride 
C) SF6, sulfur hexafluoride 
D) NO2, nitrogen dioxide 
E) SO, sulfur monoxide 
A) CCl4, carbon tetrachloride 
B) P2N5, phosphorus pentanitride 
C) SF6, sulfur hexafluoride 
D) NO2, nitrogen dioxide 
E) SO, sulfur monoxide

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

He is the symbol for ________

The average atomic mass of zinc is 65.39 amu. Given the data in the following table, what is the natural abundance of 66Zn? Isotope Mass (amu) Natural Abundance (%) 64Zn 63)9291 48)89 66Zn 65)9260 ? 67Zn 66)9271 4)11 68Zn 67)9249 18)56 70Zn 69)9253 0)62

Provide the number of protons, neutrons, and electrons in a silicon-29 isotope.

Which anion is not labeled correctly?

A Mn2+ ion has ________ protons, ________ neutrons, and ________electrons.

The Rutherford-Geiger-Marsden gold foil experiments paved the way for the nuclear model of the atom, replacing ________ of the atom.

A hypothetical element has two stable isotopes: one isotope has a mass of 106.9051 amu with an abundance of 48.183%, the other isotope has a mass of 108.9048 amu with an abundance of 51.825%. What is the average atomic mass of this element?

Identify the binary compound that has ionic bonding.

When 10.0 g of sulfur is combined with 10.0 g of oxygen, 20.0 g of sulfur dioxide is formed. What mass of oxygen would be required to convert 10.0 g of sulfur into sulfur trioxide?

What is the correct symbol for an alpha particle?

Sodium nitrite, which is used in meat processing, has been implicated as a possible health hazard because it can react with amines present in meat to form trace quantities of carcinogenic nitrosamines. What is the formula of sodium nitrite?

What is the correct symbol for an electron?

Active metals often form a protective oxide surface film that prevents further reaction of the metal with oxygen in the air. Which one of the following formulas for the metal oxide is not correct?

What is the correct name for the acid HNO2?

Zinc oxide is found in ointments for the skin. What formula best describes this compound, which has Zn as a doubly charged cation?

Based on its position in the periodic table, which atom would you predict to form an ionic compound with two bromine atoms?

What is the correct symbol for a neutron?

Which of the following is an alkaline earth metal?

Who was the first scientist to determine the charge of an electron?

Which of the following molecular compounds has an incorrect formula or is not named correctly?

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

The average atomic mass of zinc is 65.39 amu. Given the data in the following table, what is the natural abundance of ⁶⁶Zn? Isotope Mass (amu) Natural Abundance (%) ⁶⁴Zn 63)9291 48)89 ⁶⁶Zn 65)9260 ? ⁶⁷Zn 66)9271 4)11 ⁶⁸Zn 67)9249 18)56 ⁷⁰Zn 69)9253 0)62

A Mn²⁺ ion has protons, neutrons, and electrons.

What is the correct name for the acid HNO₂?