Question 1

Which of the following symbol/name pairs is/are correctly matched?
(i)Fl,Fluorine
(ii)N,Neon
(iii)S,Sodium
(iv)Ch,Chlorine
(v)H,Hydrogen

Accepted Answer

A) i,ii,and v 
B) i,iii,and v 
C) i and v 
D) iv and v 
E) v only 
A) i,ii,and v 
B) i,iii,and v 
C) i and v 
D) iv and v 
E) v only

Question 2

Which of the following is the correct classification for both sodium and chlorine?

Accepted Answer

A) Na is a main group element and a metal and Cl is a main group element and a nonmetal. 
B) Na is a main group element and a nonmetal and Cl is a main group element and a nonmetal. 
C) Na is a main group element and a nonmetal and Cl is a main group element and a metal. 
D) Na is a main group element and a metal and Cl is a main group element and a metal. 
E) Na is a main group element and a metal and Cl is a transition element and a nonmetal. 
A) Na is a main group element and a metal and Cl is a main group element and a nonmetal. 
B) Na is a main group element and a nonmetal and Cl is a main group element and a nonmetal. 
C) Na is a main group element and a nonmetal and Cl is a main group element and a metal. 
D) Na is a main group element and a metal and Cl is a main group element and a metal. 
E) Na is a main group element and a metal and Cl is a transition element and a nonmetal.

Question 3

Which of the following gives the correct number of elements in each of the first six periods in the periodic table?
Period 1 Period 2 Period 3 Period 4 Period 5 Period 6

Accepted Answer

A) 7 6 4 4 4 4 
B) 3 8 8 18 18 18 
C) 3 8 8 18 18 32 
D) 2 8 8 18 18 18 
E) 2 8 8 18 18 32 
A) 7 6 4 4 4 4 
B) 3 8 8 18 18 18 
C) 3 8 8 18 18 32 
D) 2 8 8 18 18 18 
E) 2 8 8 18 18 32

Question 4

Consider the following generic picture of an atom.   Which of the following is correct about the regions labeled 1 and 2?

Accepted Answer

A) Region 2 is populated by electrons and neutrons. 
B) Region 2 is populated by electrons an protons. 
C) Region 1 is populated by protons and neutrons. 
D) Region 1 is populated by protons and electrons. 
E) Region 1 is populated only by electrons and Region 2 only by protons. 
A) Region 2 is populated by electrons and neutrons. 
B) Region 2 is populated by electrons an protons. 
C) Region 1 is populated by protons and neutrons. 
D) Region 1 is populated by protons and electrons. 
E) Region 1 is populated only by electrons and Region 2 only by protons.

Question 5

The natural distribution of the isotopes of a hypothetical element is 60.795% at a mass of 281.99481 u,22.122% at a mass of 283.99570 u,and the remainder has a mass of 286.99423 u.Calculate the atomic mass of the element.

Accepted Answer

A) 281.99 u 
B) 283.29 u 
C) 284.00 u 
D) 284.33 u 
E) 286.99 u 
A) 281.99 u 
B) 283.29 u 
C) 284.00 u 
D) 284.33 u 
E) 286.99 u

Question 6

Which of the following is correct?

Accepted Answer

A) The element H is in both the first period and the seventh period 
B) The element Na is in Group 2A/2 
C) The element Ge is in the fourth period and Group 4A/14 
D) The element Cr is in the third period and Group 6B/6 
E) More than one of the statements above are correct 
A) The element H is in both the first period and the seventh period 
B) The element Na is in Group 2A/2 
C) The element Ge is in the fourth period and Group 4A/14 
D) The element Cr is in the third period and Group 6B/6 
E) More than one of the statements above are correct

Question 7

Which of the following is not a description of atoms according to Dalton's atomic theory?

Accepted Answer

A) Atoms cannot be destroyed or created 
B) Atoms of different elements may combine in the ratio of small,whole numbers to form compounds 
C) Atoms of the same element that have different masses are called isotopes 
D) All atoms of one element have the same mass 
E) Atoms of two different elements have different masses 
A) Atoms cannot be destroyed or created 
B) Atoms of different elements may combine in the ratio of small,whole numbers to form compounds 
C) Atoms of the same element that have different masses are called isotopes 
D) All atoms of one element have the same mass 
E) Atoms of two different elements have different masses

Question 8

Which of the following is the best explanation of why the mass of an atom is usually expressed in atomic mass units rather than grams?

Accepted Answer

A) An atomic mass unit is only used for carbon-12 
B) The mass of one milliliter of water is one gram 
C) The mass in grams is not known for atoms 
D) The mass of an atom in grams is inconveniently small 
E) Metric units such as grams are not applicable to atoms 
A) An atomic mass unit is only used for carbon-12 
B) The mass of one milliliter of water is one gram 
C) The mass in grams is not known for atoms 
D) The mass of an atom in grams is inconveniently small 
E) Metric units such as grams are not applicable to atoms

Question 9

Which of the following is correct for the second period element in Group 5A/15?
Atomic Number Chemical Symbol Atomic mass

Accepted Answer

A) 38 Sr 87.62 
B) 15 P 30.97 
C) 30.97 P 15 
D) 7 N 14.01 
E) 14.01 N 7 
A) 38 Sr 87.62 
B) 15 P 30.97 
C) 30.97 P 15 
D) 7 N 14.01 
E) 14.01 N 7

Question 10

One of the main features of Dalton's atomic theory no longer considered valid is: All atoms of each element are identical in every respect.Which of the following is the best explanation of why this feature is no longer considered valid?

Accepted Answer

A) The existence of isotopes 
B) Mass is conserved in a chemical change 
C) Nearly all of the mass of an atom is concentrated in the nucleus 
D) The total charge of the electrons of an atom exactly balances the positive charge of the nucleus 
E) The planetary model of the atom has been shown to be incorrect 
A) The existence of isotopes 
B) Mass is conserved in a chemical change 
C) Nearly all of the mass of an atom is concentrated in the nucleus 
D) The total charge of the electrons of an atom exactly balances the positive charge of the nucleus 
E) The planetary model of the atom has been shown to be incorrect

Question 11

Which of the following is the correct classification for both calcium and iron?

Accepted Answer

A) Ca is a transition element and a metal and Fe is a transition element and a metal. 
B) Ca is a transition element and a metal and Fe is a transition element and a nonmetal. 
C) Ca is a main group element and a metal and Fe is a transition element and a nonmetal. 
D) Ca is a main group element and a metal and Fe is a transition element and a metal. 
E) Ca is a main group element and a nonmetal and Fe is a main group element and a metal. 
A) Ca is a transition element and a metal and Fe is a transition element and a metal. 
B) Ca is a transition element and a metal and Fe is a transition element and a nonmetal. 
C) Ca is a main group element and a metal and Fe is a transition element and a nonmetal. 
D) Ca is a main group element and a metal and Fe is a transition element and a metal. 
E) Ca is a main group element and a nonmetal and Fe is a main group element and a metal.

Question 12

Dalton's atomic theory led to a prediction that must be true if the theory is correct: when two elements combine to form a compound,the masses in which they combine is constant..What is the name of this Law that followed from Dalton's atomic theory?

Accepted Answer

A) The Law of Weight Ratios 
B) The Law of Multiple Proportions 
C) The Law of Definite Composition 
D) The Law of Conservation of Weight 
E) The Law of Conservation of Mass 
A) The Law of Weight Ratios 
B) The Law of Multiple Proportions 
C) The Law of Definite Composition 
D) The Law of Conservation of Weight 
E) The Law of Conservation of Mass

Question 13

Which of the following statements is false?

Accepted Answer

A) The atomic mass unit is exactly 1/12 of the mass of a carbon-12 atom 
B) Both protons and neutrons have atomic masses very close to 1 u 
C) A carbon-12 atom with six electrons has a mass of 12.6 u 
D) The atomic mass of an element is the average mass of the atoms of an element compared to an atom of carbon-12 at exactly 12 u 
E) To find the atomic mass of an element,you must know the atomic mass of each isotope and the fraction of each isotope in a sample 
A) The atomic mass unit is exactly 1/12 of the mass of a carbon-12 atom 
B) Both protons and neutrons have atomic masses very close to 1 u 
C) A carbon-12 atom with six electrons has a mass of 12.6 u 
D) The atomic mass of an element is the average mass of the atoms of an element compared to an atom of carbon-12 at exactly 12 u 
E) To find the atomic mass of an element,you must know the atomic mass of each isotope and the fraction of each isotope in a sample

Question 14

Consider the following figure which represents an element block on the periodic table.   If this is the block for the nonmetal found in period 3 group 5A,the question marks 1,2,and 3 should be filled in,respectively,with which of the following?

Accepted Answer

A) 33,As,74.92 
B) 23,V,50.94 
C) 15,P,30.97 
D) 39,Y,88.91 
A) 33,As,74.92 
B) 23,V,50.94 
C) 15,P,30.97 
D) 39,Y,88.91

Question 15

Which of the following features of Dalton's atomic theory is/are no longer considered valid?
(i)Each element is made up of tiny,individual particles called atoms
(ii)Atoms are indivisible; they cannot be created or destroyed
(iii)All atoms of each element are identical in every respect
(iv)Atoms of one element are different from atoms of any other element
v)Atoms of one element may combine with atoms of another element to form chemical compounds

Accepted Answer

A) ii only 
B) iii only 
C) iv only 
D) ii and iii 
E) ii,iii,and iv 
A) ii only 
B) iii only 
C) iv only 
D) ii and iii 
E) ii,iii,and iv

Question 16

Which of the following statements is false?

Accepted Answer

A) Atoms of the same element that have different masses are called isotopes 
B) The masses of isotopes vary because they have different numbers of electrons 
C) The mass number of an isotope is the total number of protons and neutrons in the nucleus 
D) You can find the mass number of an atom given the number of protons and neutrons,but without being given the number of electrons 
E) Every atom of a particular element has the same number of protons 
A) Atoms of the same element that have different masses are called isotopes 
B) The masses of isotopes vary because they have different numbers of electrons 
C) The mass number of an isotope is the total number of protons and neutrons in the nucleus 
D) You can find the mass number of an atom given the number of protons and neutrons,but without being given the number of electrons 
E) Every atom of a particular element has the same number of protons

Question 17

Copper has two naturally occurring isotopes with atomic masses of 62.9296 u (   )and 64.9278 u (   ).The atomic mass of copper is 63.546 u.What is the percent distribution of the isotopes?

Accepted Answer

A) 69.15%   ,30.85%   
B) 30.85%   ,69.15%   
C) 1.08%   ,98.92%   
D) 98.92%   ,1.08%   
E) 99.03%   ,0.97%   
A) 69.15%   ,30.85%   
B) 30.85%   ,69.15%   
C) 1.08%   ,98.92%   
D) 98.92%   ,1.08%   
E) 99.03%   ,0.97%

Question 18

Isotopes of an element vary in mass because of differing numbers of:

Accepted Answer

A) Protons 
B) Neutrons 
C) Electrons 
D) Protons and neutrons 
E) Protons and electrons 
A) Protons 
B) Neutrons 
C) Electrons 
D) Protons and neutrons 
E) Protons and electrons

Question 19

Examine the block on the periodic table indicated by the arrow.   Which of the following correctly describes this element (V - vanadium)?

Accepted Answer

A) a metal with 25 neutrons in the nucleus. 
B) a transition metal in period 3 group 5. 
C) a transition metal in period 4 with 23 protons 
D) a nonmetal in period 4 group 5 
E) a metal in period 3 group 5 with 23 electrons 
A) a metal with 25 neutrons in the nucleus. 
B) a transition metal in period 3 group 5. 
C) a transition metal in period 4 with 23 protons 
D) a nonmetal in period 4 group 5 
E) a metal in period 3 group 5 with 23 electrons

Question 20

Consider the following figure.   Which of the following correctly identifies the quantities labeled 1,2,and 3?

Accepted Answer

A) 1 - atomic mass,2 - element name,3 - mass number 
B) 1 - atomic number,2 - element symbol,3 -atomic mass 
C) 1 - mass number ,2 - element symbol,3 - atomic mass 
D) 1 - mass number,2 - element name,3 - atomic number 
E) 1 - atomic number,2 - element symbol,3 - mass number 
A) 1 - atomic mass,2 - element name,3 - mass number 
B) 1 - atomic number,2 - element symbol,3 -atomic mass 
C) 1 - mass number ,2 - element symbol,3 - atomic mass 
D) 1 - mass number,2 - element name,3 - atomic number 
E) 1 - atomic number,2 - element symbol,3 - mass number

Which of the following symbol/name pairs is/are correctly matched? (i)Fl,Fluorine (ii)N,Neon (iii)S,Sodium (iv)Ch,Chlorine (v)H,Hydrogen

Which of the following is the correct classification for both sodium and chlorine?

Which of the following gives the correct number of elements in each of the first six periods in the periodic table? Period 1 Period 2 Period 3 Period 4 Period 5 Period 6

Consider the following generic picture of an atom. Which of the following is correct about the regions labeled 1 and 2?

The natural distribution of the isotopes of a hypothetical element is 60.795% at a mass of 281.99481 u,22.122% at a mass of 283.99570 u,and the remainder has a mass of 286.99423 u.Calculate the atomic mass of the element.

Which of the following is correct?

Which of the following is not a description of atoms according to Dalton's atomic theory?

Which of the following is the best explanation of why the mass of an atom is usually expressed in atomic mass units rather than grams?

Which of the following is correct for the second period element in Group 5A/15? Atomic Number Chemical Symbol Atomic mass

One of the main features of Dalton's atomic theory no longer considered valid is: All atoms of each element are identical in every respect.Which of the following is the best explanation of why this feature is no longer considered valid?

Which of the following is the correct classification for both calcium and iron?

Dalton's atomic theory led to a prediction that must be true if the theory is correct: when two elements combine to form a compound,the masses in which they combine is constant..What is the name of this Law that followed from Dalton's atomic theory?

Which of the following statements is false?

Consider the following figure which represents an element block on the periodic table. If this is the block for the nonmetal found in period 3 group 5A,the question marks 1,2,and 3 should be filled in,respectively,with which of the following?

Which of the following statements is false?

Copper has two naturally occurring isotopes with atomic masses of 62.9296 u ( )and 64.9278 u ( ).The atomic mass of copper is 63.546 u.What is the percent distribution of the isotopes?

Isotopes of an element vary in mass because of differing numbers of:

Examine the block on the periodic table indicated by the arrow. Which of the following correctly describes this element (V - vanadium)?

Consider the following figure. Which of the following correctly identifies the quantities labeled 1,2,and 3?

Matter and Energy

Measurement and Chemical Calculations

Introduction to Gases

Chemical Nomenclature

Chemical Formula Relationships

Chemical Reactions

Chemical Change

Quantity Relationships in Chemical Reactions

Atomic Theory: the Quantum Model of the Atom

Chemical Bonding

Structure and Shape

The Ideal Gas Law and Its Applications

Gases, liquids, and Solids

Solutions

Acid-Base Proton-Transferreactions

Chemical Equilibrium

Oxidation-Reduction Redoxreactions

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Exam 5: Atomic Theory: the Nuclear Model of the Atom

Which of the following symbol/name pairs is/are correctly matched? (i)Fl,Fluorine (ii)N,Neon (iii)S,Sodium (iv)Ch,Chlorine (v)H,Hydrogen

Which of the following is the correct classification for both sodium and chlorine?

Which of the following gives the correct number of elements in each of the first six periods in the periodic table? Period 1 Period 2 Period 3 Period 4 Period 5 Period 6

Consider the following generic picture of an atom. Which of the following is correct about the regions labeled 1 and 2?

The natural distribution of the isotopes of a hypothetical element is 60.795% at a mass of 281.99481 u,22.122% at a mass of 283.99570 u,and the remainder has a mass of 286.99423 u.Calculate the atomic mass of the element.

Which of the following is correct?

Which of the following is not a description of atoms according to Dalton's atomic theory?

Which of the following is the best explanation of why the mass of an atom is usually expressed in atomic mass units rather than grams?

Which of the following is correct for the second period element in Group 5A/15? Atomic Number Chemical Symbol Atomic mass

One of the main features of Dalton's atomic theory no longer considered valid is: All atoms of each element are identical in every respect.Which of the following is the best explanation of why this feature is no longer considered valid?

Which of the following is the correct classification for both calcium and iron?

Dalton's atomic theory led to a prediction that must be true if the theory is correct: when two elements combine to form a compound,the masses in which they combine is constant..What is the name of this Law that followed from Dalton's atomic theory?

Which of the following statements is false?

Consider the following figure which represents an element block on the periodic table. If this is the block for the nonmetal found in period 3 group 5A,the question marks 1,2,and 3 should be filled in,respectively,with which of the following?

Which of the following statements is false?

Copper has two naturally occurring isotopes with atomic masses of 62.9296 u ( )and 64.9278 u ( ).The atomic mass of copper is 63.546 u.What is the percent distribution of the isotopes?

Isotopes of an element vary in mass because of differing numbers of:

Examine the block on the periodic table indicated by the arrow. Which of the following correctly describes this element (V - vanadium)?

Consider the following figure. Which of the following correctly identifies the quantities labeled 1,2,and 3?

Matter and Energy

Measurement and Chemical Calculations

Introduction to Gases

Chemical Nomenclature

Chemical Formula Relationships

Chemical Reactions

Chemical Change

Quantity Relationships in Chemical Reactions

Atomic Theory: the Quantum Model of the Atom

Chemical Bonding

Structure and Shape

The Ideal Gas Law and Its Applications

Gases, liquids, and Solids

Solutions

Acid-Base Proton-Transferreactions

Chemical Equilibrium

Oxidation-Reduction Redoxreactions

Nuclear Chemistry

Organic Chemistry

Biochemistry

Filters