Question 1

When two or more atoms, ions, or molecules combine to form a new and larger molecule, the process is called a

Accepted Answer

A)  decomposition reaction. 
B)  synthesis reaction. 
C)  reversible reaction. 
D)  buffer reaction. 
E)  equilibrium reaction. 
A)  decomposition reaction. 
B)  synthesis reaction. 
C)  reversible reaction. 
D)  buffer reaction. 
E)  equilibrium reaction.

Question 2

If an iron atom (Fe) lost three electrons, what would be the charge of the resulting ion?

Accepted Answer

A)  Fe-3 
B)  Fe+6 
C)  Fe+1 
D)  Fe+2 
E)  Fe+3 
A)  Fe-3 
B)  Fe+6 
C)  Fe+1 
D)  Fe+2 
E)  Fe+3

Question 3

This figure represents an example of a(n)

Accepted Answer

A)  steroid. 
B)  triglyceride. 
C)  phospholipids. 
D)  wax. 
E)  fatty acid. 
A)  steroid. 
B)  triglyceride. 
C)  phospholipids. 
D)  wax. 
E)  fatty acid.

Question 4

Given that sodium bicarbonate dissociates to form Na+ and HCO3- when mixed with water, which of these would be part of the explanation for taking bicarbonate (NaHCO3) for excess stomach acid?

Accepted Answer

A)  NaHCO3 will not release hydrogen ions when mixed with water. 
B)  HCO3- will be a hydrogen ion acceptor. 
C)  Free hydrogen ions increase the acidity of a solution. 
D)  When bicarbonate ions combine with hydrogen ions, the pH increases. 
E)  All of these are necessary to fully explain how sodium bicarbonate works to counter excess stomach acid. 
A)  NaHCO3 will not release hydrogen ions when mixed with water. 
B)  HCO3- will be a hydrogen ion acceptor. 
C)  Free hydrogen ions increase the acidity of a solution. 
D)  When bicarbonate ions combine with hydrogen ions, the pH increases. 
E)  All of these are necessary to fully explain how sodium bicarbonate works to counter excess stomach acid.

Question 5

After a neutral atom accepts an additional electron, it becomes

Accepted Answer

A)  positively charged. 
B)  negatively charged. 
C)  an ion. 
D)  a molecule. 
E)  both negatively charged and an ion at the same time. 
A)  positively charged. 
B)  negatively charged. 
C)  an ion. 
D)  a molecule. 
E)  both negatively charged and an ion at the same time.

Question 6

The amount of matter in an object is its

Accepted Answer

A)  mass. 
B)  weight. 
C)  atomic number. 
D)  element. 
E)  ionic charge. 
A)  mass. 
B)  weight. 
C)  atomic number. 
D)  element. 
E)  ionic charge.

Question 7

Which of the following is NOT considered a compound?

Accepted Answer

A)  water (H20). 
B)  sodium chloride (NaCl). 
C)  hydrogen chloride (HCl) 
D)  a hydrogen molecule (H2) 
E)  all of these are compounds. 
A)  water (H20). 
B)  sodium chloride (NaCl). 
C)  hydrogen chloride (HCl) 
D)  a hydrogen molecule (H2) 
E)  all of these are compounds.

Question 8

This figure represents an example of a(n)

Accepted Answer

A)  protein. 
B)  nucleic acid. 
C)  lipid. 
D)  carbohydrate. 
E)  ATP molecule. 
A)  protein. 
B)  nucleic acid. 
C)  lipid. 
D)  carbohydrate. 
E)  ATP molecule.

Question 9

Which of the following is responsible for most of the mass of an atom?

Accepted Answer

A)  neutron. 
B)  proton. 
C)  electron. 
D)  both neutrons and protons 
E)  both electrons and neutrons 
A)  neutron. 
B)  proton. 
C)  electron. 
D)  both neutrons and protons 
E)  both electrons and neutrons

Question 10

Which of the following statements is true?

Accepted Answer

A)  Ionic compounds dissociate in water because the positive ions are attracted to the negative ends of the water molecules and negative ions are attracted to the positive ends of water molecules. 
B)  Ionic compounds dissociate in water because negative ions are attracted to the negative ends of the water molecules and positive ions are attracted to the positive ends of water molecules. 
A)  Ionic compounds dissociate in water because the positive ions are attracted to the negative ends of the water molecules and negative ions are attracted to the positive ends of water molecules. 
B)  Ionic compounds dissociate in water because negative ions are attracted to the negative ends of the water molecules and positive ions are attracted to the positive ends of water molecules.

Question 11

Every atom of the element carbon has the same number of

Accepted Answer

A)  protons. 
B)  neutrons. 
C)  electrons. 
D)  photons. 
E)  quarks. 
A)  protons. 
B)  neutrons. 
C)  electrons. 
D)  photons. 
E)  quarks.

Question 12

Non polar molecules:

Accepted Answer

A)  are created when the bonding atoms share electrons equally between themselves. 
B)  have an asymmetrical electrical charge. 
C)  are also considered ions. 
D)  result from polar covalent bonds. 
E)  all of these 
A)  are created when the bonding atoms share electrons equally between themselves. 
B)  have an asymmetrical electrical charge. 
C)  are also considered ions. 
D)  result from polar covalent bonds. 
E)  all of these

Question 13

The unequal, asymmetric sharing of electrons which results in one end (pole) of the molecule having a small electrical charge opposite the other end is called

Accepted Answer

A)  hydrogen bonding. 
B)  polar covalent bonding. 
C)  double covalent bonding. 
D)  ionic bonding. 
E)  non-polar covalent bonding. 
A)  hydrogen bonding. 
B)  polar covalent bonding. 
C)  double covalent bonding. 
D)  ionic bonding. 
E)  non-polar covalent bonding.

Question 14

The chemical compound that is represented by the acronym ATP

Accepted Answer

A)  is synthesized using energy released during the breakdown of food molecules. 
B)  can be broken down to ADP and a fatty acid. 
C)  has nothing to do with stored energy. 
D)  is a common temporary storage form of immediately usable energy within cells. 
E)  is synthesized using energy released during the breakdown of food molecules and is a common temporary storage form of immediately usable energy within cells. 
A)  is synthesized using energy released during the breakdown of food molecules. 
B)  can be broken down to ADP and a fatty acid. 
C)  has nothing to do with stored energy. 
D)  is a common temporary storage form of immediately usable energy within cells. 
E)  is synthesized using energy released during the breakdown of food molecules and is a common temporary storage form of immediately usable energy within cells.

Question 15

Atom X has an atomic number of 20 and has a mass number of 40. The number of protons in atom X is equal to

Accepted Answer

A)  10. 
B)  20. 
C)  30. 
D)  40. 
E)  60. 
A)  10. 
B)  20. 
C)  30. 
D)  40. 
E)  60.

When two or more atoms, ions, or molecules combine to form a new and larger molecule, the process is called a

If an iron atom (Fe) lost three electrons, what would be the charge of the resulting ion?

This figure represents an example of a(n)

Given that sodium bicarbonate dissociates to form Na⁺ and HCO₃^- when mixed with water, which of these would be part of the explanation for taking bicarbonate (NaHCO₃) for excess stomach acid?

After a neutral atom accepts an additional electron, it becomes

The amount of matter in an object is its

Which of the following is NOT considered a compound?

This figure represents an example of a(n)

Which of the following is responsible for most of the mass of an atom?

Which of the following statements is true?

Every atom of the element carbon has the same number of

Non polar molecules:

The unequal, asymmetric sharing of electrons which results in one end (pole) of the molecule having a small electrical charge opposite the other end is called

The chemical compound that is represented by the acronym ATP

Atom X has an atomic number of 20 and has a mass number of 40. The number of protons in atom X is equal to

The Human Organism

Cell Structures and Their Functions

Tissuesasis of Life

Integumentary System

Skeletal System: Bones and Joints

Muscular System

Nervous System

Senses

Endocrine System

Blood

Heart

Blood Vessels and Circulation

The Lymphatic System and Immunity

Respiratory System

Digestive System

Nutrition, Metabolism, and Body Temperature Regulation

Urinary System and Fluid Balance

Reproductive System

Development, Heredity, and Aging

Filters

Exam 2: The Chemical Basis of Life

When two or more atoms, ions, or molecules combine to form a new and larger molecule, the process is called a

If an iron atom (Fe) lost three electrons, what would be the charge of the resulting ion?

This figure represents an example of a(n)

Given that sodium bicarbonate dissociates to form Na+ and HCO3- when mixed with water, which of these would be part of the explanation for taking bicarbonate (NaHCO3) for excess stomach acid?

After a neutral atom accepts an additional electron, it becomes

The amount of matter in an object is its

Which of the following is NOT considered a compound?

This figure represents an example of a(n)

Which of the following is responsible for most of the mass of an atom?

Which of the following statements is true?

Every atom of the element carbon has the same number of

Non polar molecules:

The unequal, asymmetric sharing of electrons which results in one end (pole) of the molecule having a small electrical charge opposite the other end is called

The chemical compound that is represented by the acronym ATP

Atom X has an atomic number of 20 and has a mass number of 40. The number of protons in atom X is equal to

The Human Organism

Cell Structures and Their Functions

Tissuesasis of Life

Integumentary System

Skeletal System: Bones and Joints

Muscular System

Nervous System

Senses

Endocrine System

Blood

Heart

Blood Vessels and Circulation

The Lymphatic System and Immunity

Respiratory System

Digestive System

Nutrition, Metabolism, and Body Temperature Regulation

Urinary System and Fluid Balance

Reproductive System

Development, Heredity, and Aging

Filters

Given that sodium bicarbonate dissociates to form Na⁺ and HCO₃^- when mixed with water, which of these would be part of the explanation for taking bicarbonate (NaHCO₃) for excess stomach acid?