Question 1

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

Accepted Answer

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

Question 2

You recently discovered a new element,and find that this particular element has one electron in its outer energy level.What would you expect will happen to an atom of this element if placed in water?

Accepted Answer

A) It will lose an electron forming a positive ion. 
B) It will lose an electron forming a negative ion. 
C) It will gain an electron forming a positive ion. 
D) It will gain an electron forming a negative ion.

Question 3

In the crystal matrix of ordinary salt,the sodium and chlorine are held together by:

Accepted Answer

A) peptide bonds. 
B) covalent bonds. 
C) ionic bonds. 
D) hydrogen bonds. 
E) nonpolar bonds.

Question 4

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

Accepted Answer

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

Question 5

How many hydrogen bonds can a water molecule form?

Accepted Answer

A) 1 
B) 2 
C) 3 
D) 4 
E) 5

Question 6

Oxygen has an atomic mass of 16 and an atomic number of 8.How many neutrons are present?

Accepted Answer

A) 24 
B) 8 
C) 16 
D) 4

Question 7

The high heat of vaporization of water helps you to feel cooler when you sweat because the transition of water from a liquid to a gas requires a ________ of energy to break hydrogen bonds.The energy is ________ from heat produced by your body,thus helping to lower the surface temperature of your body.

Accepted Answer

A) release; released 
B) release; obtained 
C) input; obtained 
D) input; released

Question 8

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 
E) sulfur

Question 9

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 10

You walk down into your basement to find that the carpeting on the floor is damp.Concerned,you look around for large puddles of water or broken pipes,but find none.In fact,only the basement floor and carpeting is damp.You realize that water must have wicked into the carpet from the floor by ________.

Accepted Answer

A) adhesion and cohesion 
B) adhesion and solubility 
C) adhesion,cohesion,and solubility 
D) cohesion and solubility

Question 11

Which atomic particle has no charge and is located in the nucleus?

Accepted Answer

A) electron 
B) ion 
C) neutron 
D) proton 
E) isotope

Question 12

The two nitrogen atoms in nitrogen gas (N2)share six electrons forming a ________.

Accepted Answer

A) triple covalent bond 
B) double covalent bond 
C) single covalent bond 
D) hydrogen bond 
E) double bond

Question 13

If water were nonpolar it would not form hydrogen bonds.At normal room temperatures this nonpolar water would be ________.

Accepted Answer

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

Question 14

The reaction (H2 + F2 → 2HF)is an example of a redox reaction.In reality,two half reactions are occurring.The half reaction (H2 → 2H+ + 2e-)is a(n):

Accepted Answer

A) reduction reaction 
B) oxidation reaction 
C) redox reaction 
D) potential energy reaction

Question 15

Dennis had a history of heart disease in his family and was reducing his intake of saturated fats.Saturated means each carbon atom is bonded to as many hydrogen atoms as it can accept.If a carbon were bonded to two carbons,how many hydrogens could it accept?

Accepted Answer

A) 0 
B) 1 
C) 2 
D) 3 
E) 4

Question 16

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 17

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 18

In a chemical analysis of an animal tissue sample,which element would be in the least quantity?

Accepted Answer

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

Question 19

Cl + e- → Cl- is an example of a:

Accepted Answer

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

Question 20

Bicarbonate ions in the blood can absorb hydrogen ions,keeping pH balanced.Bicarbonate is acting as a ________ in blood.

Accepted Answer

A) buffer 
B) acid 
C) base 
D) alkaline

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

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

You recently discovered a new element,and find that this particular element has one electron in its outer energy level.What would you expect will happen to an atom of this element if placed in water?

In the crystal matrix of ordinary salt,the sodium and chlorine are held together by:

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

How many hydrogen bonds can a water molecule form?

Oxygen has an atomic mass of 16 and an atomic number of 8.How many neutrons are present?

The high heat of vaporization of water helps you to feel cooler when you sweat because the transition of water from a liquid to a gas requires a of energy to break hydrogen bonds.The energy is from heat produced by your body,thus helping to lower the surface temperature of your body.

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

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

Which atomic particle has no charge and is located in the nucleus?

The two nitrogen atoms in nitrogen gas (N₂) share six electrons forming a ________.

If water were nonpolar it would not form hydrogen bonds.At normal room temperatures this nonpolar water would be ________.

The reaction (H₂ + F₂→ 2HF) is an example of a redox reaction.In reality,two half reactions are occurring.The half reaction (H₂ → 2H⁺+ 2e^-) is a(n) :

Dennis had a history of heart disease in his family and was reducing his intake of saturated fats.Saturated means each carbon atom is bonded to as many hydrogen atoms as it can accept.If a carbon were bonded to two carbons,how many hydrogens could it accept?

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

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:

In a chemical analysis of an animal tissue sample,which element would be in the least quantity?

Cl + e^- → Cl^- is an example of a:

Bicarbonate ions in the blood can absorb hydrogen ions,keeping pH balanced.Bicarbonate is acting as a ________ in blood.

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

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

You recently discovered a new element,and find that this particular element has one electron in its outer energy level.What would you expect will happen to an atom of this element if placed in water?

In the crystal matrix of ordinary salt,the sodium and chlorine are held together by:

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

How many hydrogen bonds can a water molecule form?

Oxygen has an atomic mass of 16 and an atomic number of 8.How many neutrons are present?

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

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

Which atomic particle has no charge and is located in the nucleus?

The two nitrogen atoms in nitrogen gas (N2) share six electrons forming a ________.

If water were nonpolar it would not form hydrogen bonds.At normal room temperatures this nonpolar water would be ________.

The reaction (H2 + F2 → 2HF) is an example of a redox reaction.In reality,two half reactions are occurring.The half reaction (H2 → 2H+ + 2e-) is a(n) :

Dennis had a history of heart disease in his family and was reducing his intake of saturated fats.Saturated means each carbon atom is bonded to as many hydrogen atoms as it can accept.If a carbon were bonded to two carbons,how many hydrogens could it accept?

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

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:

In a chemical analysis of an animal tissue sample,which element would be in the least quantity?

Cl + e- → Cl- is an example of a:

Bicarbonate ions in the blood can absorb hydrogen ions,keeping pH balanced.Bicarbonate is acting as a ________ in blood.

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

The two nitrogen atoms in nitrogen gas (N₂) share six electrons forming a ________.

The reaction (H₂ + F₂→ 2HF) is an example of a redox reaction.In reality,two half reactions are occurring.The half reaction (H₂ → 2H⁺+ 2e^-) is a(n) :

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

Cl + e^- → Cl^- is an example of a: