Question 1

Which of the following is a metalloid?

Accepted Answer

A) carbon,C,Z = 6 
B) sulfur,S,Z = 16 
C) germanium,Ge,Z = 32 
D) iridium,Z = 77 
E) bromine,Br,Z = 35 
A) carbon,C,Z = 6 
B) sulfur,S,Z = 16 
C) germanium,Ge,Z = 32 
D) iridium,Z = 77 
E) bromine,Br,Z = 35

Question 2

Who is credited with discovering the atomic nucleus?

Accepted Answer

A) Dalton 
B) Gay-Lussac 
C) Thomson 
D) Millikan 
E) Rutherford 
A) Dalton 
B) Gay-Lussac 
C) Thomson 
D) Millikan 
E) Rutherford

Question 3

The compound, (NH4)2S,can be used in analysis for trace amounts of metals present in a sample.What is its name?

Accepted Answer

A) ammonium sulfide 
B) diammonium sulfide 
C) ammonium sulfite 
D) ammonia(I)sulfite 
E) ammonium(I)sulfide 
A) ammonium sulfide 
B) diammonium sulfide 
C) ammonium sulfite 
D) ammonia(I)sulfite 
E) ammonium(I)sulfide

Question 4

What is the formula for lead (II)oxide?

Accepted Answer

A) PbO 
B) PbO2 
C) Pb2O 
D) PbO4 
E) Pb2O3  
A) PbO 
B) PbO2 
C) Pb2O 
D) PbO4 
E) Pb2O3

Question 5

For each of the following names,write down the corresponding formula,including charge where appropriate (atomic numbers and mass numbers are not required):
a.zinc ion
b.nitrite ion
c.carbonic acid
d.cyanide ion

Accepted Answer

a.Zn²⁺ b.NO₂^-

Question 6

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

Accepted Answer

A) BaSO4 
B) Ba(SO4)2 
C) Ba2SO4 
D) Ba2(SO4)3 
E) BaSO3  
A) BaSO4 
B) Ba(SO4)2 
C) Ba2SO4 
D) Ba2(SO4)3 
E) BaSO3

Question 7

Which of the following ions occurs commonly?

Accepted Answer

A) N3+ 
B) S6+ 
C) O2- 
D) Ca+ 
E) Cl+ 
A) N3+ 
B) S6+ 
C) O2- 
D) Ca+ 
E) Cl+

Question 8

Iodine pentafluoride reacts slowly with glass and violently with water.Determine its molecular mass.

Accepted Answer

A) 653.52 amu 
B) 259.89 amu 
C) 221.90 amu 
D) 202.90 amu 
E) 145.90 amu 
A) 653.52 amu 
B) 259.89 amu 
C) 221.90 amu 
D) 202.90 amu 
E) 145.90 amu

Question 9

Who is credited with first measuring the charge of the electron?

Accepted Answer

A) Dalton 
B) Gay-Lussac 
C) Thomson 
D) Millikan 
E) Rutherford 
A) Dalton 
B) Gay-Lussac 
C) Thomson 
D) Millikan 
E) Rutherford

Question 10

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 11

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

Accepted Answer

A) O2- oxide 
B) Al3+ aluminum 
C) NO3- nitrate 
D) PO43- phosphate 
E) CrO42- chromate 
A) O2- oxide 
B) Al3+ aluminum 
C) NO3- nitrate 
D) PO43- phosphate 
E) CrO42- chromate

Question 12

Rutherford bombarded gold foil with alpha ($\alpha$)particles and found that a small percentage of the particles were deflected.Which of the following was not accounted for by the model he proposed for the structure of atoms?

Accepted Answer

A) the small size of the nucleus 
B) the charge on the nucleus 
C) the total mass of the atom 
D) the existence of protons 
E) the presence of electrons outside the nucleus 
A) the small size of the nucleus 
B) the charge on the nucleus 
C) the total mass of the atom 
D) the existence of protons 
E) the presence of electrons outside the nucleus

Question 13

a.Give the names of the following ions:
(i)O22-
  (ii)SO42-
 b.Write down the formulas of the following ions:
(i)ammonium
(ii)nitrate

Accepted Answer

a.(i)perox

Question 14

Which of the following elements are the least reactive?

Accepted Answer

A) alkali metals 
B) noble gases 
C) halogens 
D) alkaline earth metals 
E) metalloids 
A) alkali metals 
B) noble gases 
C) halogens 
D) alkaline earth metals 
E) metalloids

Question 15

Zinc acetate is used in preserving wood and in manufacturing glazes for porcelain.What is its formula?

Accepted Answer

A) ZnAc2 
B) ZnCH3COO 
C) Zn(CH3COO)2 
D) Zn2CH3COO 
E) ZnCH3COCH3  
A) ZnAc2 
B) ZnCH3COO 
C) Zn(CH3COO)2 
D) Zn2CH3COO 
E) ZnCH3COCH3

Question 16

Who is credited with measuring the mass/charge ratio of the electron?

Accepted Answer

A) Dalton 
B) Gay-Lussac 
C) Thomson 
D) Millikan 
E) Rutherford 
A) Dalton 
B) Gay-Lussac 
C) Thomson 
D) Millikan 
E) Rutherford

Question 17

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 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.l0 amu 
C) 118.13 amu 
D) 128.11 amu 
E) 132.13 amu 
A) 63.07 amu 
B) 114.l0 amu 
C) 118.13 amu 
D) 128.11 amu 
E) 132.13 amu

Question 19

Lead (Pb)is a main-group element.

Accepted Answer

A) True 
 B)False

Question 20

Bromine is the only nonmetal that is a liquid at room temperature.Consider the isotope bromine-81,  
.Select the combination which lists the correct atomic number,neutron number,and mass number,respectively.

Accepted Answer

A) 35,46,81 
B) 35,81,46 
C) 81,46,35 
D) 46,81,35 
E) 35,81,116 
A) 35,46,81 
B) 35,81,46 
C) 81,46,35 
D) 46,81,35 
E) 35,81,116

Exam 2: The Components of Matter

Which of the following is a metalloid?

Who is credited with discovering the atomic nucleus?

The compound, (NH4)2S,can be used in analysis for trace amounts of metals present in a sample.What is its name?

What is the formula for lead (II)oxide?

For each of the following names,write down the corresponding formula,including charge where appropriate (atomic numbers and mass numbers are not required): a.zinc ion b.nitrite ion c.carbonic acid d.cyanide ion

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

Which of the following ions occurs commonly?

Iodine pentafluoride reacts slowly with glass and violently with water.Determine its molecular mass.

Who is credited with first measuring the charge of the electron?

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

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

Rutherford bombarded gold foil with alpha ( α\alphaα )particles and found that a small percentage of the particles were deflected.Which of the following was not accounted for by the model he proposed for the structure of atoms?

a.Give the names of the following ions: (i)O22- (ii)SO42- b.Write down the formulas of the following ions: (i)ammonium (ii)nitrate

Which of the following elements are the least reactive?

Zinc acetate is used in preserving wood and in manufacturing glazes for porcelain.What is its formula?

Who is credited with measuring the mass/charge ratio of the electron?

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

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

Lead (Pb)is a main-group element.

Bromine is the only nonmetal that is a liquid at room temperature.Consider the isotope bromine-81, .Select the combination which lists the correct atomic number,neutron number,and mass number,respectively.

Keys to the Study of Chemistry

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 Solutions

The Main-Group Elements: Applying Principles of Bonding and Structure

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 the Direction of Chemical Reactions

Electrochemistry: Chemical Change and Electrical Work

The Transition Elements and Their Coordination Compounds

Nuclear Reactions and Their Applications

Filters

The compound, (NH₄)₂S,can be used in analysis for trace amounts of metals present in a sample.What is its name?

Rutherford bombarded gold foil with alpha ( $\alpha$ )particles and found that a small percentage of the particles were deflected.Which of the following was not accounted for by the model he proposed for the structure of atoms?

a.Give the names of the following ions: (i)O₂^2- (ii)SO₄^2- b.Write down the formulas of the following ions: (i)ammonium (ii)nitrate

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