Question 1

What is the name of the halogen in period 4?

Accepted Answer

A)  iodine 
B)  bromine 
C)  barium 
D)  neon 
E)  potassium 
A)  iodine 
B)  bromine 
C)  barium 
D)  neon 
E)  potassium

Question 2

Which atom is most likely to form a 2+ ion?

Accepted Answer

A)  scandium 
B)  calcium 
C)  aluminum 
D)  oxygen 
E)  fluorine 
A)  scandium 
B)  calcium 
C)  aluminum 
D)  oxygen 
E)  fluorine

Question 3

The element chlorine has two stable isotopes,chlorine-35 with an atomic mass of 34.97 u and chlorine-37 with an atomic mass of 36.97 u.From the atomic weight found on the periodic table,one can conclude that:

Accepted Answer

A)  both isotopes have the same percent natural abundance 
B)  there is an isotope of nitrogen with an atomic mass of 35.45 u 
C)  chlorine-35 has the highest percent natural abundance 
D)  chlorine-37 has the highest percent natural abundance 
A)  both isotopes have the same percent natural abundance 
B)  there is an isotope of nitrogen with an atomic mass of 35.45 u 
C)  chlorine-35 has the highest percent natural abundance 
D)  chlorine-37 has the highest percent natural abundance

Question 4

Rank the subatomic particles from least to greatest mass.

Accepted Answer

A)  electron mass = proton mass = neutron mass 
B)  electron mass = neutron mass < proton mass 
C)  electron mass = proton mass < neutron mass 
D)  electron mass < proton mass < neutron mass 
E)  electron mass < proton mass = neutron mass 
A)  electron mass = proton mass = neutron mass 
B)  electron mass = neutron mass < proton mass 
C)  electron mass = proton mass < neutron mass 
D)  electron mass < proton mass < neutron mass 
E)  electron mass < proton mass = neutron mass

Question 5

What is the mass percent of each element in sulfuric acid,H2SO4?

Accepted Answer

A)  2.055% H,$~~$32.69% S,$~~$65.25% O 
B)  1.028% H,$~~$32.69% S,$~~$66.28% O 
C)  28.57% H,$~~$14.29% S,$~~$57.17% O 
D)  1.028% H,$~~$33.72% S,$~~$65.25% O 
E)  2.016% H,$~~$32.07% S,$~~$65.91% O 
A)  2.055% H,$~~$32.69% S,$~~$65.25% O 
B)  1.028% H,$~~$32.69% S,$~~$66.28% O 
C)  28.57% H,$~~$14.29% S,$~~$57.17% O 
D)  1.028% H,$~~$33.72% S,$~~$65.25% O 
E)  2.016% H,$~~$32.07% S,$~~$65.91% O

Question 6

What is the correct formula for calcium nitrate?

Accepted Answer

A)  CaN 
B)  Ca3N2 
C)  CaNO2 
D)  Ca3(NO3)2 
E)  Ca(NO3)2 
A)  CaN 
B)  Ca3N2 
C)  CaNO2 
D)  Ca3(NO3)2 
E)  Ca(NO3)2

Question 7

What is the correct formula for potassium dihydrogen phosphate?

Accepted Answer

A)  KH2PO4 
B)  K2HPO4 
C)  K2H2PO4 
D)  K3H2PO4 
E)  KH2P 
A)  KH2PO4 
B)  K2HPO4 
C)  K2H2PO4 
D)  K3H2PO4 
E)  KH2P

Question 8

What is the mass of 0.71 mol Na?

Accepted Answer

A)  1.2 $\times$ 10-24 g 
B)  12 g 
C)  16 g 
D)  0.031 g 
E)  32 g 
A)  1.2 $\times$ 10-24 g 
B)  12 g 
C)  16 g 
D)  0.031 g 
E)  32 g

Question 9

The formula of acetic acid,CH3CO2H,is an example of a(n)

Accepted Answer

A)  condensed formula. 
B)  empirical formula. 
C)  structural formula. 
D)  ionic compound formula. 
E)  mass spectrum. 
A)  condensed formula. 
B)  empirical formula. 
C)  structural formula. 
D)  ionic compound formula. 
E)  mass spectrum.

Question 10

How many neutrons are there in an atom of gallium-71 ?

Accepted Answer

A)  31 
B)  2 
C)  102 
D)  71 
E)  40 
A)  31 
B)  2 
C)  102 
D)  71 
E)  40

Question 11

Calculate the number of moles in 0.48 g Cu.

Accepted Answer

A)  0.033 mol 
B)  0.48 mol 
C)  31 mol 
D)  7.6 $\times$ 10-3 mol 
E)  1.3 $\times$ 102 mol 
A)  0.033 mol 
B)  0.48 mol 
C)  31 mol 
D)  7.6 $\times$ 10-3 mol 
E)  1.3 $\times$ 102 mol

Question 12

Which element belongs to the actinides?

Accepted Answer

A)  curium 
B)  rubidium 
C)  barium 
D)  iodine 
E)  krypton 
A)  curium 
B)  rubidium 
C)  barium 
D)  iodine 
E)  krypton

Question 13

In which ionic compound,NaBr or KBr,is the force of attraction between anions and cations stronger?

Accepted Answer

The force of attraction is stronger for

Question 14

Which of the following statements concerning atomic structure is/are correct?
1)Neutrons and electrons are found in space as a cloud around the nucleus.
2)The nucleus contains all the positive charge of an atom.
3)Electrons surround the nucleus and account for the majority of an atom's volume.

Accepted Answer

A)  1 only 
B)  2 only 
C)  3 only 
D)  2 and 3 
E)  1,2,and 3 
A)  1 only 
B)  2 only 
C)  3 only 
D)  2 and 3 
E)  1,2,and 3

Question 15

What is the mass percent of chlorine in magnesium chloride?

Accepted Answer

A)  25.53% 
B)  37.24% 
C)  40.67% 
D)  59.33% 
E)  74.47% 
A)  25.53% 
B)  37.24% 
C)  40.67% 
D)  59.33% 
E)  74.47%

Question 16

Which of the following atomic symbols represents an isotope of   ?

Accepted Answer

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

Question 17

Predict which ionic compound has the highest melting point.

Accepted Answer

A)  KBr 
B)  MgO 
C)  RbI 
D)  CaBr2 
E)  CsCl 
A)  KBr 
B)  MgO 
C)  RbI 
D)  CaBr2 
E)  CsCl

Question 18

How many protons are there in an atom of scandium-45?

Accepted Answer

A)  25 
B)  66 
C)  20 
D)  21 
E)  24 
A)  25 
B)  66 
C)  20 
D)  21 
E)  24

Question 19

A nail is coated with a 0.053 cm thick layer of zinc.The surface area of the nail is 8.59 cm2.The density of zinc is 7.13 g/cm3.How many zinc atoms are used in the coating?

Accepted Answer

A)  5.9 $\times$ 1020 atoms 
B)  3.0 $\times$ 1022 atoms 
C)  3.8 $\times$ 1022 atoms 
D)  2.0 $\times$ 1024 atoms 
E)  1.3 $\times$ 1026 atoms 
A)  5.9 $\times$ 1020 atoms 
B)  3.0 $\times$ 1022 atoms 
C)  3.8 $\times$ 1022 atoms 
D)  2.0 $\times$ 1024 atoms 
E)  1.3 $\times$ 1026 atoms

Question 20

Pure oxygen can exist as O2 or O3.Elements that exist in more than one distinct form are called ________.

Accepted Answer

Exam 3: Atoms, molecules, and Ions

What is the name of the halogen in period 4?

Which atom is most likely to form a 2+ ion?

The element chlorine has two stable isotopes,chlorine-35 with an atomic mass of 34.97 u and chlorine-37 with an atomic mass of 36.97 u.From the atomic weight found on the periodic table,one can conclude that:

Rank the subatomic particles from least to greatest mass.

What is the mass percent of each element in sulfuric acid,H2SO4?

What is the correct formula for calcium nitrate?

What is the correct formula for potassium dihydrogen phosphate?

What is the mass of 0.71 mol Na?

The formula of acetic acid,CH3CO2H,is an example of a(n)

How many neutrons are there in an atom of gallium-71 ?

Calculate the number of moles in 0.48 g Cu.

Which element belongs to the actinides?

In which ionic compound,NaBr or KBr,is the force of attraction between anions and cations stronger?

Which of the following statements concerning atomic structure is/are correct? 1)Neutrons and electrons are found in space as a cloud around the nucleus. 2)The nucleus contains all the positive charge of an atom. 3)Electrons surround the nucleus and account for the majority of an atom's volume.

What is the mass percent of chlorine in magnesium chloride?

Which of the following atomic symbols represents an isotope of ?

Predict which ionic compound has the highest melting point.

How many protons are there in an atom of scandium-45?

A nail is coated with a 0.053 cm thick layer of zinc.The surface area of the nail is 8.59 cm2.The density of zinc is 7.13 g/cm3.How many zinc atoms are used in the coating?

Pure oxygen can exist as O2 or O3.Elements that exist in more than one distinct form are called ________.

Basic Concepts of Chemistry

Mathlets Review: The Tools of Quantitative Chemistry

Chemical Reactions

Stoichiometry: Quantitative Information About Chemical Reactions

Principles of Chemical Reactivity: Energy and Chemical Reactions

The Structure of Atoms

The Structure of Atoms and Periodic Trends

Bonding and Molecular Structure

Bonding and Molecular Structure: Orbital Hybridization and Molecular Orbitals

Gases and Their Properties

Intermolecular Forces and Liquids

The Chemistry of Solids

Solutions and Their Behavior

Chemical Kinetics: the Rates of Chemical Reactions

Principles of Reactivity: Chemical Equilibria

The Chemistry of Acids and Bases

Principles of Reactivity: Other Aspects of Aqueous Equilibria

Entropy and Free Energy

Principles of Reactivity: Electron Transfer Reactions

Environmental Chemistry Earths Environment,energy,and Sustainability

The Chemistry of the Main Group Elements

The Chemistry of the Transition Elements

Carbon: Not Just Another Element

Biochemistry

Nuclear Chemistry

Filters

What is the mass percent of each element in sulfuric acid,H₂SO₄?

The formula of acetic acid,CH₃CO₂H,is an example of a(n)

A nail is coated with a 0.053 cm thick layer of zinc.The surface area of the nail is 8.59 cm².The density of zinc is 7.13 g/cm³.How many zinc atoms are used in the coating?

Pure oxygen can exist as O₂ or O₃.Elements that exist in more than one distinct form are called ________.