Chapter Two Reading Quiz

Question 1

Isotopes are atoms that have

A. the same number of protons, but different numbers of electrons
B. the same number of neutrons, but different numbers of electons
C. the same number of protons, but different numbers of neutrons
D. the same number of neutrons, but different numbers of protons

Answer 1

C. the same number of protons, but different numbers of neutrons

Question 2

A base or alkali has a pH that is
A. 7
B. greater than 7
C. less than 7

Answer 2

B. greater than 7

Question 3

The major biological elements are

A. carbon, hydrogen, oxygen, nitrogen
B. hydrogen, oxygen, phosphorus and iron
C. carbon, magnesium, oxygen and hydrogen
D. sodium, potassium, calcium and sulfur

Answer 3

A. carbon, hydrogen, oxygen, nitrogen

Question 4

Oxygen gas (O_2) is an example of a

A. molecule
B. compound
C. mixture

Answer 4

A. molecule

Question 5

Water is a versatile solvent because of its

A. hydrogen bonds
B. polarity

Answer 5

B. polarity

Question 6

The arrangement of elements according to their chemical properties is the

A. Mendeleev table
B. atomic table
C. periodic table
D. elemental table

Answer 6

C. periodic table

Question 7

Minor biological elements include

A. carbon, hydrogen, oxygen, nitrogen
B. hydrogen, oxygen, phosphorus and iron
C. sodium, potassium, calcium and sulfur
D. carbon, magnesium, oxygen and hydrogen

Answer 7

C. sodium, potassium, calcium and sulfur

Question 8

Water’s temperature stabilizing effects and cohesiveness are because of its

A. polarity
B. hydrogen bonds

Answer 8

B. hydrogen bonds

Question 9

All atoms of an element have the same number of

A. protons and neutrons
B. protons
C. neutrons
D. electrons

Answer 9

B. protons

Question 10

A bond in which electrons are shared equally is a

A. hydrogen bond
B. ionic bond
C. polar covalent bond
D. nonpolar covalent bond

Answer 10

D. nonpolar covalent bond

Question 11

A polar covalent bond forms between atoms with
A. similar electronegativtities
B. very different electronegativities
C. somewhat different electronegativities

Answer 11

C. somewhat different electronegativities

Question 12

A molecule that donates hydrogen ions is a(n)
A base
B. acid

Answer 12

B. acid

Question 13

An ionic bond forms between atoms with

A. very different electronegativities
B. similar electronegativities
C. somewhat different electronegativities

Answer 13

A. very different electronegativities

Question 14

The atomic number of an element is the number of

A. electrons 
B. neutrons 
C. protons + electrons 
D. protons 
E. protons + neutrons

Answer 14

D. protons

Question 15

Temperature is a measure of

A. molecular motion
B. molecular pressure
C. bond strength
D. potential energy

Answer 15

A. molecular motion

Question 16

Of the following, the weakest bond is the

A. polar covalent bond
B. nonpolar covalent bond
C. hydrogen bond
D. ionic bond

Answer 16

C. hydrogen bond

Question 17

The normal pH range of most fluids in the human body is

A. 7.3 to 7.5
B. 5.9 to 6.7
C. 9.4 to 10.0
D. 2.0 to 8.3

Answer 17

A. 7.3 to 7.5

Question 18

A substance that readily dissolves in water is

A. aquaphilic
B. hydrophobic
C. nonpolar
D. hydrophilic

Answer 18

D. hydrophilic

Question 19

The pH of pure water is

A. 7
B. 9
C. 3
D. 5

Answer 19

A. 7

Question 20

A substance that does not readily dissolve in water is

A. hydrophilic
B. hydrophobic
C. polar
D. aquaphobic

Answer 20

B. hydrophobic

Question 21

Two different types of elements chemically bonded in a fixed ratio form a

A. compound
B. mixture
C. solution

Answer 21

A. compound

Question 22

If an atom has more protons than electrons, it has a

A. positive charge
B. negative charge
C. neutral charge

Answer 22

A. positive charge

Question 23

The mass number of an element is the number of

A. protons + electrons 
B. neutrons 
C. neutrons + electrons 
D. protons + neutrons 
D. protons

Answer 23

D. protons + neutrons