Question 1

Which of the following statements is not true about the element vanadium?

Accepted Answer

A)  It is a metal. 
B)  It has chemical and physical properties most similar to krypton. 
C)  It is in period 4. 
D)  It has chemical and physical properties most similar to silver. 
E)  It is in group 5B. 
A)  It is a metal. 
B)  It has chemical and physical properties most similar to krypton. 
C)  It is in period 4. 
D)  It has chemical and physical properties most similar to silver. 
E)  It is in group 5B. D

Question 2

If two different isotopes have the same atomic number,it means that _____.

Accepted Answer

A)  they have the same atomic mass 
B)  they have the same atomic number 
C)  they have the same number of protons 
D)  they have the same number of electrons 
E)  they have the same number of neutrons 
A)  they have the same atomic mass 
B)  they have the same atomic number 
C)  they have the same number of protons 
D)  they have the same number of electrons 
E)  they have the same number of neutrons C

Question 3

Which of the following formulas is not correct?

Accepted Answer

A)  AlPO4 
B)  KClO4 
C)  CaS 
D)  Na(NO3)2 
E)  Na2HPO4 
A)  AlPO4 
B)  KClO4 
C)  CaS 
D)  Na(NO3)2 
E)  Na2HPO4 D

Question 4

The masses of isotopes and their abundances are determined experimentally using _____.

Accepted Answer

A)  a mass spectrometer 
B)  an analytical balance 
C)  a centrifuge 
D)  distillation 
E)  electrolysis 
A)  a mass spectrometer 
B)  an analytical balance 
C)  a centrifuge 
D)  distillation 
E)  electrolysis

Question 5

What is the approximate mass of 0.71 mol Na?

Accepted Answer

A)  1.2 × 10-24 g 
B)  12 g 
C)  16 g 
D)  0.031 g 
E)  32 g 
A)  1.2 × 10-24 g 
B)  12 g 
C)  16 g 
D)  0.031 g 
E)  32 g

Question 6

Which of the following is the correct atomic symbol for an element with 17 protons and 18 neutrons?

Accepted Answer

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

Question 7

How many neutrons are there in an atom of copper-63 ?

Accepted Answer

A)  29 
B)  2 
C)  92 
D)  63 
E)  34 
A)  29 
B)  2 
C)  92 
D)  63 
E)  34

Question 8

Which of the following atoms of elements is most likely to form a 2- ion?

Accepted Answer

A)  Potassium 
B)  Magnesium 
C)  Phosphorus 
D)  Bromine 
E)  Sulfur 
A)  Potassium 
B)  Magnesium 
C)  Phosphorus 
D)  Bromine 
E)  Sulfur

Question 9

Which of the following is the correct formula for an ionic compound that contains barium ions and carbonate ions?

Accepted Answer

A)  BaCO3 
B)  Ba(HCO3)2 
C)  Ba2CO3 
D)  Ba2C 
E)  Ba(CO3)2 
A)  BaCO3 
B)  Ba(HCO3)2 
C)  Ba2CO3 
D)  Ba2C 
E)  Ba(CO3)2

Question 10

If 1.00 g of an unknown molecular compound contains 8.35 × 1021 molecules,what is its molar mass?

Accepted Answer

A)  44.0 g/mol 
B)  66.4 g/mol 
C)  72.1 g/mol 
D)  98.1 g/mol 
E)  132 g/mol 
A)  44.0 g/mol 
B)  66.4 g/mol 
C)  72.1 g/mol 
D)  98.1 g/mol 
E)  132 g/mol

Question 11

An ionic compound has the formula MCl2.The mass of 0.3011 mol of the compound is 62.69 grams.What is the identity of the metal?

Accepted Answer

A)  Nickel (Ni) 
B)  Copper (Cu) 
C)  Tin (Sn) 
D)  Mercury (Hg) 
E)  Barium (Ba) 
A)  Nickel (Ni) 
B)  Copper (Cu) 
C)  Tin (Sn) 
D)  Mercury (Hg) 
E)  Barium (Ba)

Question 12

The fully hydrated form of sodium sulfate is the decahydrate,Na2SO4⋅10H2O.This compound dehydrates (loses some waters of hydration)when heated.A sample of partially dehydrated sodium sulfate was found to have a molar mass of 232 g/mol.How many water molecules are found per formula unit in in this sample? (Determine n in Na2SO4⋅ nH2O).

Accepted Answer

A)  5 molecules of water 
B)  8 molecules of water 
C)  10 molecules of water 
D)  6 molecules of water 
E)  1 molecules of water 
A)  5 molecules of water 
B)  8 molecules of water 
C)  10 molecules of water 
D)  6 molecules of water 
E)  1 molecules of water

Question 13

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

Question 14

The numerical quantity of a mole,6.022 × 1023,is defined as the number of atoms in a specific mass of an element.What is the mass and the identity of the element used to define one mole?

Accepted Answer

A mole is equal to t

Question 15

How many protons,neutrons,and electrons are present in an atom of iron-59?

Accepted Answer

A)  26 protons,33 neutrons,and 59 electrons 
B)  26 protons,33 neutrons,and 33 electrons 
C)  26 protons,33 neutrons,and 26 electrons 
D)  59 protons,26 neutrons,and 59 electrons 
E)  59 protons,26 neutrons,and 26 electrons 
A)  26 protons,33 neutrons,and 59 electrons 
B)  26 protons,33 neutrons,and 33 electrons 
C)  26 protons,33 neutrons,and 26 electrons 
D)  59 protons,26 neutrons,and 59 electrons 
E)  59 protons,26 neutrons,and 26 electrons

Question 16

Which of the following atoms contains the least protons?

Accepted Answer

A)  (232Th) 
B)  (231Pa) 
C)  (245Pu) 
D)  (238U) 
E)  (232Pa) 
A)  (232Th) 
B)  (231Pa) 
C)  (245Pu) 
D)  (238U) 
E)  (232Pa)

Question 17

Which of the following atomic symbols represents an isotope of   ?

Accepted Answer

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

Question 18

Oxygen and _____ are the two most abundant elements in the Earth's crust.

Accepted Answer

The answer of Oxygen and _____ are the two most...

Question 19

The correct name for the compound P2F4 is _____.

Accepted Answer

A)  diphosphorus tetrafluoride 
B)  phosphorus fluoride 
C)  diphosphide tetrafluoride 
D)  diphosphorus tetrafluorine 
E)  phosphorus tetrafluorine 
A)  diphosphorus tetrafluoride 
B)  phosphorus fluoride 
C)  diphosphide tetrafluoride 
D)  diphosphorus tetrafluorine 
E)  phosphorus tetrafluorine

Question 20

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

Exam 3: Atoms, molecules, and Ions

Which of the following statements is not true about the element vanadium?

If two different isotopes have the same atomic number,it means that _____.

Which of the following formulas is not correct?

The masses of isotopes and their abundances are determined experimentally using _____.

What is the approximate mass of 0.71 mol Na?

Which of the following is the correct atomic symbol for an element with 17 protons and 18 neutrons?

How many neutrons are there in an atom of copper-63 ?

Which of the following atoms of elements is most likely to form a 2- ion?

Which of the following is the correct formula for an ionic compound that contains barium ions and carbonate ions?

If 1.00 g of an unknown molecular compound contains 8.35 × 1021 molecules,what is its molar mass?

An ionic compound has the formula MCl2.The mass of 0.3011 mol of the compound is 62.69 grams.What is the identity of the metal?

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?

The numerical quantity of a mole,6.022 × 1023,is defined as the number of atoms in a specific mass of an element.What is the mass and the identity of the element used to define one mole?

How many protons,neutrons,and electrons are present in an atom of iron-59?

Which of the following atoms contains the least protons?

Which of the following atomic symbols represents an isotope of ?

Oxygen and _____ are the two most abundant elements in the Earth's crust.

The correct name for the compound P2F4 is _____.

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

Basic Concepts of Chemistry

Lets 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 Solid State

Solutions and Their Behavior

Chemical Kinetics: the Rates of Chemical Reactions

Principles of Chemical Reactivity: Equilibria

Principles of Chemical Reactivity: the Chemistry of Acids and Bases

Principles of Chemical Reactivity: Other Aspects of Aqueous Equilibria

Principles of Chemical Reactivity: Entropy and Free Energy

Principles of Chemical 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

If 1.00 g of an unknown molecular compound contains 8.35 × 10²¹ molecules,what is its molar mass?

An ionic compound has the formula MCl₂.The mass of 0.3011 mol of the compound is 62.69 grams.What is the identity of the metal?

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?

The numerical quantity of a mole,6.022 × 10²³,is defined as the number of atoms in a specific mass of an element.What is the mass and the identity of the element used to define one mole?

The correct name for the compound P₂F₄ is_____.