Question 1

Which of the following is a metalloid?

Accepted Answer

A)  S 
B)  Si 
C)  Sn 
D)  Sr 
A)  S 
B)  Si 
C)  Sn 
D)  Sr

Question 2

Which of the following elements has the largest atoms?

Accepted Answer

A)  Cl 
B)  P 
C)  S 
D)  None, they are all the same size. 
A)  Cl 
B)  P 
C)  S 
D)  None, they are all the same size.

Question 3

Which of the following has the highest ionization energy?

Accepted Answer

A)  Ba 
B)  Ca 
C)  Mg 
D)  Sr 
A)  Ba 
B)  Ca 
C)  Mg 
D)  Sr

Question 4

Which of the following statements correctly describes an electron?

Accepted Answer

A)  On the scale of subatomic particles, it is massive and has a +1 charge. 
B)  On the scale of subatomic particles, it is massive and has a -1 charge. 
C)  On the scale of subatomic particles, it is light and has a +1 charge. 
D)  On the scale of subatomic particles, it is light and has a -1 charge. 
A)  On the scale of subatomic particles, it is massive and has a +1 charge. 
B)  On the scale of subatomic particles, it is massive and has a -1 charge. 
C)  On the scale of subatomic particles, it is light and has a +1 charge. 
D)  On the scale of subatomic particles, it is light and has a -1 charge.

Question 5

Which of the following has the lowest ionization energy?

Accepted Answer

A)  Br 
B)  Cl 
C)  F 
D)  I 
A)  Br 
B)  Cl 
C)  F 
D)  I

Question 6

Consider the image given below.   Which of the following is the correct designation for the orbital?

Accepted Answer

A)  s 
B)  px 
C)  py 
D)  pz 
E)  d 
A)  s 
B)  px 
C)  py 
D)  pz 
E)  d

Question 7

Which of the following laws enables us to characterize a compound by a specific chemical formula?

Accepted Answer

A)  the law of conservation of energy 
B)  the law of conservation of mass 
C)  the law of constant composition 
D)  all of these 
A)  the law of conservation of energy 
B)  the law of conservation of mass 
C)  the law of constant composition 
D)  all of these

Question 8

Which of the following is formed when sodium reacts with water?

Accepted Answer

A)  NaH 
B)  NaO 
C)  Na2O 
D)  NaOH 
A)  NaH 
B)  NaO 
C)  Na2O 
D)  NaOH

Question 9

Which element accounts for nearly half the mass of the Earth's crust?

Accepted Answer

A)  carbon 
B)  iron 
C)  oxygen 
D)  silicon 
A)  carbon 
B)  iron 
C)  oxygen 
D)  silicon

Question 10

Sodium chlorate, an ingredient in many common herbicides, has sodium, chlorine, and oxygen atoms in the ratio 1:1:3. What is the correct formula for sodium chlorate?

Accepted Answer

A)  NaCO3 
B)  SoClO3 
C)  NaClO3 
D)  SoCO3 
A)  NaCO3 
B)  SoClO3 
C)  NaClO3 
D)  SoCO3

Question 11

Suppose a new element named questinium has two isotopes. These isotopes are Qu-297 (40.30%, 296.78 amu) and Qu-301 (59.70%, 300.88 amu). What is the atomic weight of questinium, reported to the correct number of significant digits?

Accepted Answer

A)  299 amu 
B)  299.0 amu 
C)  299.12 amu 
D)  299.23 amu 
A)  299 amu 
B)  299.0 amu 
C)  299.12 amu 
D)  299.23 amu

Question 12

Which type of subatomic particle does an atom gain or lose to become an ion?

Accepted Answer

A)  An atom gains or loses protons. 
B)  An atom gains or loses neutrons. 
C)  An atom gains or loses electrons. 
D)  It depends on the atom involved. 
A)  An atom gains or loses protons. 
B)  An atom gains or loses neutrons. 
C)  An atom gains or loses electrons. 
D)  It depends on the atom involved.

Question 13

Which element is present in the largest amount (by mass) in the human body?

Accepted Answer

A)  carbon 
B)  hydrogen 
C)  nitrogen 
D)  oxygen 
A)  carbon 
B)  hydrogen 
C)  nitrogen 
D)  oxygen

Question 14

Which of the following has the highest ionization energy?

Accepted Answer

A)  Cl 
B)  F 
C)  N 
D)  O 
A)  Cl 
B)  F 
C)  N 
D)  O

Question 15

Which group of elements is characterized by the properties of ductility, malleability, and the ability to conduct heat and electricity?

Accepted Answer

A)  all elements 
B)  metallic elements 
C)  metalloid elements 
D)  nonmetallic elements 
A)  all elements 
B)  metallic elements 
C)  metalloid elements 
D)  nonmetallic elements

Question 16

Which of the following has the lowest ionization energy?

Accepted Answer

A)  Ba 
B)  Ca 
C)  Mg 
D)  Sr 
A)  Ba 
B)  Ca 
C)  Mg 
D)  Sr

Question 17

Which of the following is formed when potassium reacts with water?

Accepted Answer

A)  KH 
B)  KO 
C)  KOH 
D)  K2O 
A)  KH 
B)  KO 
C)  KOH 
D)  K2O

Question 18

Which of the following statements, which was a part of Dalton's atomic theory, was later proved to be false?

Accepted Answer

A)  All matter is made up of very tiny indivisible particles called atoms. 
B)  In ordinary chemical reactions, no atom of any element disappears or is changed into an atom of another element. 
C)  Compounds are formed by the chemical combination of two or more elements. 
D)  A molecule is a tightly bound combination of two or more atoms that act as a single unit. 
A)  All matter is made up of very tiny indivisible particles called atoms. 
B)  In ordinary chemical reactions, no atom of any element disappears or is changed into an atom of another element. 
C)  Compounds are formed by the chemical combination of two or more elements. 
D)  A molecule is a tightly bound combination of two or more atoms that act as a single unit.

Question 19

Sodium is a highly reactive metal and chlorine is a toxic gas. When they are mixed, they form sodium chloride, which is essential for life. Which of the following statements is true when sodium and chlorine are brought into contact with one another?

Accepted Answer

A)  They form a heterogeneous mixture. 
B)  They form a homogenous mixture. 
C)  They form a compound. 
D)  They may form a heterogeneous or a homogeneous mixture depending on the conditions that prevail during the interaction. 
A)  They form a heterogeneous mixture. 
B)  They form a homogenous mixture. 
C)  They form a compound. 
D)  They may form a heterogeneous or a homogeneous mixture depending on the conditions that prevail during the interaction.

Question 20

How many unpaired electrons are there in a carbon atom in its ground state?

Accepted Answer

A)  1 
B)  2 
C)  3 
D)  4 
A)  1 
B)  2 
C)  3 
D)  4

Exam 2: Atoms

Which of the following is a metalloid?

Which of the following elements has the largest atoms?

Which of the following has the highest ionization energy?

Which of the following statements correctly describes an electron?

Which of the following has the lowest ionization energy?

Consider the image given below. Which of the following is the correct designation for the orbital?

Which of the following laws enables us to characterize a compound by a specific chemical formula?

Which of the following is formed when sodium reacts with water?

Which element accounts for nearly half the mass of the Earth's crust?

Sodium chlorate, an ingredient in many common herbicides, has sodium, chlorine, and oxygen atoms in the ratio 1:1:3. What is the correct formula for sodium chlorate?

Suppose a new element named questinium has two isotopes. These isotopes are Qu-297 (40.30%, 296.78 amu) and Qu-301 (59.70%, 300.88 amu). What is the atomic weight of questinium, reported to the correct number of significant digits?

Which type of subatomic particle does an atom gain or lose to become an ion?

Which element is present in the largest amount (by mass) in the human body?

Which of the following has the highest ionization energy?

Which group of elements is characterized by the properties of ductility, malleability, and the ability to conduct heat and electricity?

Which of the following has the lowest ionization energy?

Which of the following is formed when potassium reacts with water?

Which of the following statements, which was a part of Dalton's atomic theory, was later proved to be false?

Sodium is a highly reactive metal and chlorine is a toxic gas. When they are mixed, they form sodium chloride, which is essential for life. Which of the following statements is true when sodium and chlorine are brought into contact with one another?

How many unpaired electrons are there in a carbon atom in its ground state?

Matter, Energy, and Measurement

Chemical Bonds

Chemical Reactions

Gases, Liquids, and Solids

Solutions and Colloids

Reaction Rates and Chemical Equilibrium

Acids and Bases

Nuclear Chemistry

Organic Chemistry

Alkanes

Alkenes, Alkynes, and Aromatic Compounds

Alcohols, Ethers, and Thiols

Chirality: the Handedness of Molecules

Amines

Aldehydes and Ketones

Carboxylic Acids

Carboxylic Anhydrides, Esters, and Amides

Carbohydrates

Lipids

Proteins

Enzymes

Chemical Communications: Neurotransmitters and Hormones

Nucleotides, Nucleic Acids, and Heredity

Gene Expression and Protein Synthesis

Bioenergetics: How the Body Converts Food to Energy

Specific Catabolic Pathways: Carbohydrate, Lipid, and Protein Metabolism

Biosynthetic Pathways

Nutrition

Immunochemistry

Body Fluids

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