Question 1

Millikan's oil-drop experiment

Accepted Answer

A) established the charge on an electron. 
B) showed that all oil drops carried the same charge. 
C) provided support for the nuclear model of the atom. 
D) suggested that some oil drops carried fractional numbers of electrons. 
E) suggested the presence of a neutral particle in the atom. 
A) established the charge on an electron. 
B) showed that all oil drops carried the same charge. 
C) provided support for the nuclear model of the atom. 
D) suggested that some oil drops carried fractional numbers of electrons. 
E) suggested the presence of a neutral particle in the atom.

Question 2

What is the formula for magnesium sulfide?

Accepted Answer

A) MgS 
B) MgS 2 
C) Mg 2S 
D) Mg 2S 3 
E) MgSO 4 
A) MgS 
B) MgS 2 
C) Mg 2S 
D) Mg 2S 3 
E) MgSO 4

Question 3

What is the name of PCl3?

Accepted Answer

A) Phosphorus chloride 
B) Phosphoric chloride 
C) Phosphorus trichlorate 
D) Trichlorophosphide 
E) Phosphorus trichloride 
A) Phosphorus chloride 
B) Phosphoric chloride 
C) Phosphorus trichlorate 
D) Trichlorophosphide 
E) Phosphorus trichloride

Question 4

The substance, CaSe, is used in materials which are electron emitters. What is its name?

Accepted Answer

A) Calcium monoselenide 
B) Calcium(II)selenide 
C) Calcium selenide 
D) Calcium(I)selenide 
E) Calcium(II)selenium 
A) Calcium monoselenide 
B) Calcium(II)selenide 
C) Calcium selenide 
D) Calcium(I)selenide 
E) Calcium(II)selenium

Question 5

The compound, BaO, absorbs water and carbon dioxide readily and is used to dry gases and organic solvents. What is its name?

Accepted Answer

A) Barium oxide 
B) Barium(II)oxide 
C) Barium monoxide 
D) Baric oxide 
E) Barium peroxide 
A) Barium oxide 
B) Barium(II)oxide 
C) Barium monoxide 
D) Baric oxide 
E) Barium peroxide

Question 6

The chemical symbol for potassium is

Accepted Answer

A) P. 
B) Po. 
C) Pt. 
D) Pm. 
E) K. 
A) P. 
B) Po. 
C) Pt. 
D) Pm. 
E) K.

Question 7

Atoms X, Y, Z, and R have the following nuclear compositions:           Which two are isotopes?

Accepted Answer

A) X & Y 
B) X & R 
C) Y & R 
D) Z & R 
E) X & Z 
A) X & Y 
B) X & R 
C) Y & R 
D) Z & R 
E) X & Z

Question 8

Which one of the following is a polyatomic cation?

Accepted Answer

A) Nitrate 
B) Chromate 
C) Permanganate 
D) Hydronium 
E) Potassium 
A) Nitrate 
B) Chromate 
C) Permanganate 
D) Hydronium 
E) Potassium

Question 9

What is the name of the acid formed when HClO4 liquid is dissolved in water?

Accepted Answer

A) Hydrochloric acid 
B) Perchloric acid 
C) Chloric acid 
D) Chlorous acid 
E) Hydrochlorate acid 
A) Hydrochloric acid 
B) Perchloric acid 
C) Chloric acid 
D) Chlorous acid 
E) Hydrochlorate acid

Question 10

Select the incorrect statement about elements and compounds.

Accepted Answer

A) All ionic compounds are neutral. 
B) Some elements exist as molecules. 
C) The bonding in compounds may be covalent or ionic. 
D) The molecular formula of a compound provides more information than the structural formula. 
E) Among the elements, there are more metals than nonmetals. 
A) All ionic compounds are neutral. 
B) Some elements exist as molecules. 
C) The bonding in compounds may be covalent or ionic. 
D) The molecular formula of a compound provides more information than the structural formula. 
E) Among the elements, there are more metals than nonmetals.

Question 11

What is the name of the acid formed when H2S gas is dissolved in water?

Accepted Answer

A) Sulfuric acid 
B) Sulfurous acid 
C) Hydrosulfuric acid 
D) Hydrosulfurous acid 
E) Sulfidic acid 
A) Sulfuric acid 
B) Sulfurous acid 
C) Hydrosulfuric acid 
D) Hydrosulfurous acid 
E) Sulfidic acid

Question 12

Barium sulfate is used in manufacturing photographic paper. What is its formula?

Accepted Answer

A) BaSO 4 
B) Ba(SO 4)2 
C) Ba 2SO 4 
D) Ba 2(SO 4)3 
E) BaSO 3 
A) BaSO 4 
B) Ba(SO 4)2 
C) Ba 2SO 4 
D) Ba 2(SO 4)3 
E) BaSO 3

Question 13

Which of the following ions occurs commonly?

Accepted Answer

A) N 3+ 
B) S 6+ 
C) O 2− 
D) Ca + 
E) Cl + 
A) N 3+ 
B) S 6+ 
C) O 2− 
D) Ca + 
E) Cl +

Question 14

An isotope of which of the following elements is chosen as a standard in measuring atomic mass?

Accepted Answer

A) Carbon 
B) Oxygen 
C) Hydrogen 
D) Neon 
E) Helium 
A) Carbon 
B) Oxygen 
C) Hydrogen 
D) Neon 
E) Helium

Question 15

The compound, P4S10, is used in the manufacture of safety matches. What is its name?

Accepted Answer

A) Phosphorus sulfide 
B) Phosphoric sulfide 
C) Phosphorus decasulfide 
D) Tetraphosphorus decasulfide 
E) Phosphorus pentasulfide 
A) Phosphorus sulfide 
B) Phosphoric sulfide 
C) Phosphorus decasulfide 
D) Tetraphosphorus decasulfide 
E) Phosphorus pentasulfide

Question 16

Which one of the following statements about atoms and subatomic particles is correct?

Accepted Answer

A) Rutherford discovered the atomic nucleus by bombarding gold foil with electrons. 
B) The proton and the neutron have identical masses. 
C) The neutron's mass is equal to that of a proton plus an electron. 
D) A neutral atom contains equal numbers of protons and electrons. 
E) An atomic nucleus contains equal numbers of protons and neutrons. 
A) Rutherford discovered the atomic nucleus by bombarding gold foil with electrons. 
B) The proton and the neutron have identical masses. 
C) The neutron's mass is equal to that of a proton plus an electron. 
D) A neutral atom contains equal numbers of protons and electrons. 
E) An atomic nucleus contains equal numbers of protons and neutrons.

Question 17

A row of the periodic table is called a

Accepted Answer

A) group. 
B) period. 
C) isotopic mixture. 
D) family. 
E) subshell. 
A) group. 
B) period. 
C) isotopic mixture. 
D) family. 
E) subshell.

Question 18

Ammonium sulfate, (NH4)2SO4, is a fertilizer widely used as a source of nitrogen. Calculate its molecular mass.

Accepted Answer

A) 63.07 amu 
B) 114.10 amu 
C) 118.13 amu 
D) 128.11 amu 
E) 132.13 amu 
A) 63.07 amu 
B) 114.10 amu 
C) 118.13 amu 
D) 128.11 amu 
E) 132.13 amu

Question 19

Bromine has two naturally occurring isotopes. 79Br has a mass of 78.9 amu and accounts for 50.3% of bromine atoms. If the atomic mass of bromine is 79.9 amu, what is the mass of an atom of the second bromine isotope?

Accepted Answer

A) 77.9 amu 
B) 80.0 amu 
C) 80.1 amu 
D) 80.9 amu 
E) 88.9 amu 
A) 77.9 amu 
B) 80.0 amu 
C) 80.1 amu 
D) 80.9 amu 
E) 88.9 amu

Question 20

Which one of the following combinations of names and formulas of ions is incorrect?

Accepted Answer

A) Ba 2+ barium 
B) S 2− sulfate 
C) CN − cyanide 
D) ClO 4 − perchlorate 
E) HCO 3 − bicarbonate 
A) Ba 2+ barium 
B) S 2− sulfate 
C) CN − cyanide 
D) ClO 4 − perchlorate 
E) HCO 3 − bicarbonate

Exam 2: The Components of Matter

Millikan's oil-drop experiment

What is the formula for magnesium sulfide?

What is the name of PCl3?

The substance, CaSe, is used in materials which are electron emitters. What is its name?

The compound, BaO, absorbs water and carbon dioxide readily and is used to dry gases and organic solvents. What is its name?

The chemical symbol for potassium is

Atoms X, Y, Z, and R have the following nuclear compositions: Which two are isotopes?

Which one of the following is a polyatomic cation?

What is the name of the acid formed when HClO4 liquid is dissolved in water?

Select the incorrect statement about elements and compounds.

What is the name of the acid formed when H2S gas is dissolved in water?

Barium sulfate is used in manufacturing photographic paper. What is its formula?

Which of the following ions occurs commonly?

An isotope of which of the following elements is chosen as a standard in measuring atomic mass?

The compound, P4S10, is used in the manufacture of safety matches. What is its name?

Which one of the following statements about atoms and subatomic particles is correct?

A row of the periodic table is called a

Ammonium sulfate, (NH4)2SO4, is a fertilizer widely used as a source of nitrogen. Calculate its molecular mass.

Bromine has two naturally occurring isotopes. 79Br has a mass of 78.9 amu and accounts for 50.3% of bromine atoms. If the atomic mass of bromine is 79.9 amu, what is the mass of an atom of the second bromine isotope?

Which one of the following combinations of names and formulas of ions is incorrect?

Keys to the Study of Chemistry: Definitions, Units, and Problem Solving

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

Periodic Patterns in the Main-Group Elements

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 Reaction Direction

Electrochemistry: Chemical Change and Electrical Work

The Elements in Nature and Industry

Transition Elements and Their Coordination Compounds

Nuclear Reactions and Their Applications

Filters

What is the name of PCl₃?

What is the name of the acid formed when HClO₄liquid is dissolved in water?

What is the name of the acid formed when H₂S gas is dissolved in water?

The compound, P₄S₁₀, is used in the manufacture of safety matches. What is its name?

Ammonium sulfate, (NH₄)₂SO₄, is a fertilizer widely used as a source of nitrogen. Calculate its molecular mass.

Bromine has two naturally occurring isotopes. ⁷⁹Br has a mass of 78.9 amu and accounts for 50.3% of bromine atoms. If the atomic mass of bromine is 79.9 amu, what is the mass of an atom of the second bromine isotope?