Question 1

If water were non-polar it would not form hydrogen bonds.At normal room temperatures this non-polar water would be _____.

Accepted Answer

A) a gas 
B) a liquid 
C) a solid

Question 2

The negative logarithm of the hydrogen ion concentration in the solution is referred to as:

Accepted Answer

A) pH 
B) atomic mass 
C) -OH concentration 
D) electronegativity

Question 3

When two atoms share a pair of electrons, the bonding is referred to as:

Accepted Answer

A) ionic. 
B) covalent. 
C) unstable. 
D) hydrogen.

Question 4

Life is thought to have evolved from complex molecules formed by the interaction of smaller molecules in oceans and the atmosphere.The substance which brought these molecules together to interact is

Accepted Answer

A) buffers. 
B) acids. 
C) water. 
D) salts.

Question 5

The amino acid glycine (C3NO2H6) is a(an):

Accepted Answer

A) element 
B) organic molecule 
C) inorganic molecule 
D) vitamin

Question 6

All atoms tend to fill their outer energy levels with the maximum number of electrons, usually eight.Depending on whether atoms satisfy the octet rule will predict:

Accepted Answer

A) the chemical behavior of the atoms. 
B) whether they will be found in nature. 
C) whether they will dissolve in water. 
D) their radioactive energy.

Question 7

How many hydrogen bonds can a water molecule form?

Accepted Answer

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

Question 8

The sub-atomic particle with a positive charge is _____.

Accepted Answer

A) a neutron 
B) an isotope 
C) an electron 
D) a proton

Question 9

Plants transport water to their leaves through the xylem when water evaporates from the leaves.The evaporating water pulls other water molecules up the xylem through ____ .

Accepted Answer

A) Hydrophobic interactions 
B) Ionic bonds 
C) Covalent bonds 
D) Hydrogen bonds

Question 10

When atoms gain or lose electrons, they become negatively or positively charged.These negatively or positively charged atoms are known as

Accepted Answer

A) isotopes. 
B) ions. 
C) isomers. 
D) unstable atoms.

Question 11

How is the bond in F2 different from the bond in KCl?

Accepted Answer

A) F2 is covalent and KCl is ionic 
B) F2 and KCl are both ionic 
C) F2 is ionic and KCl is covalent

Question 12

As you and a friend are entering a chemistry laboratory at your university, you see a sign that states: DANGER-RADIOACTIVE ISOTOPES IN USE.Your friend is an accounting major and has not had any science courses yet.She asks you what a radioactive isotope is and you respond correctly with:

Accepted Answer

A) Radioactive isotopes are atoms that are unstable and as a result emit energy in a process called radioactive decay. 
B) Radioactive isotopes are atoms that are stable and as a result emit energy in a process called radioactive decay. 
C) Radioactive isotopes are atoms that are stable and as a result only emit energy if they are exposed to higher temperatures. 
D) Radioactive isotopes are atoms that are unstable but unless actively disturbed by some chemical process will remain intact and pose no problems.

Question 13

Sugars dissolve well in water because of water's ______.

Accepted Answer

A) polarity 
B) ionic bonds 
C) hydrophobic exclusion 
D) cohesiveness

Question 14

The half-life of Carbon-14 is approximately 5,700 years.Using this information scientists have been able to determine the age of some artifacts left by humans.A scientist wants to know approximately how old a piece of wood was that she found on the floor in an old cave that had recently been discovered.She removed the wood (with permission) to her laboratory.Her wood sample contained 2 grams of Carbon-14.If the age of the wood was determined to be 22,800 years old, how much Carbon-14 originally existed in this piece of wood?

Accepted Answer

A) 32 grams 
B) 16 grams 
C) 12 grams 
D) 8 grams

Question 15

Atoms in which the number of electrons does not equal the number of protons are known as:

Accepted Answer

A) valences. 
B) ions. 
C) isotopes. 
D) isomers.

Question 16

The area around a nucleus where an electron is most likely to be found is the:

Accepted Answer

A) electrical space. 
B) energy level. 
C) polar space. 
D) orbital.

Question 17

Cl + e- $\rightarrow$ Cl- is an example of a:

Accepted Answer

A) polymerization. 
B) ionization. 
C) reduction. 
D) oxidation.

Question 18

Which element's isotope is commonly used to determine when biological samples such as fossils, were formed?

Accepted Answer

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

Question 19

In the Hershey-Chase experiment, bacterial viruses, called phage, were used to demonstrate that DNA is the genetic material.The phage that were used for this experiment consisted of DNA surrounded by a protein coat.Phage will attach to specific types of bacteria and inject their DNA into the bacterial cell.To scientifically determine whether DNA is the genetic material, Hershey and Chase made phage in a medium containing radioactive sulfur-35 (S35).Why was S35 used in this experiment?

Accepted Answer

A) Only amino acids contain sulfur. 
B) Only nucleic acids contain sulfur. 
C) Both nucleic acids and amino acids contain sulfur. 
D) The radioactive sulfur labels peptide bonds.

Question 20

Matter is composed of:

Accepted Answer

A) molecules 
B) mass 
C) energy 
D) atoms

Exam 2: The Nature of Molecules and the Properties of Water

If water were non-polar it would not form hydrogen bonds.At normal room temperatures this non-polar water would be _____.

The negative logarithm of the hydrogen ion concentration in the solution is referred to as:

When two atoms share a pair of electrons, the bonding is referred to as:

Life is thought to have evolved from complex molecules formed by the interaction of smaller molecules in oceans and the atmosphere.The substance which brought these molecules together to interact is

The amino acid glycine (C₃NO₂H₆) is a(an) :

All atoms tend to fill their outer energy levels with the maximum number of electrons, usually eight.Depending on whether atoms satisfy the octet rule will predict:

How many hydrogen bonds can a water molecule form?

The sub-atomic particle with a positive charge is _____.

Plants transport water to their leaves through the xylem when water evaporates from the leaves.The evaporating water pulls other water molecules up the xylem through ____ .

When atoms gain or lose electrons, they become negatively or positively charged.These negatively or positively charged atoms are known as

How is the bond in F₂different from the bond in KCl?

As you and a friend are entering a chemistry laboratory at your university, you see a sign that states: DANGER-RADIOACTIVE ISOTOPES IN USE.Your friend is an accounting major and has not had any science courses yet.She asks you what a radioactive isotope is and you respond correctly with:

Sugars dissolve well in water because of water's ______.

Atoms in which the number of electrons does not equal the number of protons are known as:

The area around a nucleus where an electron is most likely to be found is the:

Cl + e^- $\rightarrow$ Cl^- is an example of a:

Which element's isotope is commonly used to determine when biological samples such as fossils, were formed?

Matter is composed of:

Exam 2: The Nature of Molecules and the Properties of Water

If water were non-polar it would not form hydrogen bonds.At normal room temperatures this non-polar water would be _____.

The negative logarithm of the hydrogen ion concentration in the solution is referred to as:

When two atoms share a pair of electrons, the bonding is referred to as:

Life is thought to have evolved from complex molecules formed by the interaction of smaller molecules in oceans and the atmosphere.The substance which brought these molecules together to interact is

The amino acid glycine (C3NO2H6) is a(an) :

All atoms tend to fill their outer energy levels with the maximum number of electrons, usually eight.Depending on whether atoms satisfy the octet rule will predict:

How many hydrogen bonds can a water molecule form?

The sub-atomic particle with a positive charge is _____.

Plants transport water to their leaves through the xylem when water evaporates from the leaves.The evaporating water pulls other water molecules up the xylem through ____ .

When atoms gain or lose electrons, they become negatively or positively charged.These negatively or positively charged atoms are known as

How is the bond in F2 different from the bond in KCl?

As you and a friend are entering a chemistry laboratory at your university, you see a sign that states: DANGER-RADIOACTIVE ISOTOPES IN USE.Your friend is an accounting major and has not had any science courses yet.She asks you what a radioactive isotope is and you respond correctly with:

Sugars dissolve well in water because of water's ______.

Atoms in which the number of electrons does not equal the number of protons are known as:

The area around a nucleus where an electron is most likely to be found is the:

Cl + e- →\rightarrow→ Cl- is an example of a:

Which element's isotope is commonly used to determine when biological samples such as fossils, were formed?

Matter is composed of:

The amino acid glycine (C₃NO₂H₆) is a(an) :

How is the bond in F₂different from the bond in KCl?

Cl + e^- $\rightarrow$ Cl^- is an example of a: