Question 1

Electrons possess energy of position,also known as _____________ energy.

Accepted Answer

A) kinetic 
B) latent 
C) potential 
D) opposition 
A) kinetic 
B) latent 
C) potential 
D) opposition

Question 2

Which is not correct about water molecules?

Accepted Answer

A) Hydrogen is more electronegative than oxygen. 
B) Water is a polar molecule. 
C) Covalent bonds exist within a water molecule. 
D) Hydrogen bonds exist between water molecules. 
E) Hydrogen bonds are weak bonds. 
A) Hydrogen is more electronegative than oxygen. 
B) Water is a polar molecule. 
C) Covalent bonds exist within a water molecule. 
D) Hydrogen bonds exist between water molecules. 
E) Hydrogen bonds are weak bonds.

Question 3

We use the __________ scale to measure concentrations of hydrogen ions in a solution.

Accepted Answer

The answer of We use the __________ scale to measure...

Question 4

Nonpolar compounds are said to be _________________ because they shrink away from contact with water.

Accepted Answer

The answer of Nonpolar compounds are said to be _________________...

Question 5

The chemical bond within a water molecule is a ______ bond.

Accepted Answer

The answer of The chemical bond within a water molecule...

Question 6

Which type of chemical bond exists within a water molecule?

Accepted Answer

A) Hydrogen 
B) Ionic 
C) Covalent 
D) It depends on the temperature of the water. 
E) Weak 
A) Hydrogen 
B) Ionic 
C) Covalent 
D) It depends on the temperature of the water. 
E) Weak

Question 7

Most elements in nature exist as:

Accepted Answer

A) solitary unreactive atoms 
B) mixtures of different isotopes 
C) mixtures of gases 
D) mixtures of liquids 
A) solitary unreactive atoms 
B) mixtures of different isotopes 
C) mixtures of gases 
D) mixtures of liquids

Question 8

If an element has an atomic number of 6 and a mass number of 14,how many neutrons does it have?

Accepted Answer

A) 6 
B) 14 
C) 7 
D) 8 
E) Impossible to determine 
A) 6 
B) 14 
C) 7 
D) 8 
E) Impossible to determine

Question 9

The high surface tension of water that allows some insects to literally walk on water is due to:

Accepted Answer

A) high heat of vaporization 
B) cohesion 
C) adhesion 
D) polar covalent bonds 
E) heat storage 
A) high heat of vaporization 
B) cohesion 
C) adhesion 
D) polar covalent bonds 
E) heat storage

Question 10

Discuss the difference between covalent,ionic and hydrogen bonds.

Accepted Answer

Covalent bonds involve sharing electrons

Question 11

The first shell in any atom contains one orbital which may contain as many as

Accepted Answer

A) 2 electrons 
B) 8 protons 
C) 8 electrons 
D) 4 neutrons 
E) 2 neutrons 
A) 2 electrons 
B) 8 protons 
C) 8 electrons 
D) 4 neutrons 
E) 2 neutrons

Question 12

When an electron is transferred from one atom to the next,and the two atoms are then electrically attracted to one another,the type of bond is a(n)__________________ bond.

Accepted Answer

A) hydrogen 
B) covalent 
C) kinetic 
D) ionic 
A) hydrogen 
B) covalent 
C) kinetic 
D) ionic

Question 13

The atomic number of an atom is the:

Accepted Answer

A) number of neutrons only 
B) number of electrons plus the number of protons 
C) number of protons only 
D) number of protons plus the number of neutrons 
E) number of electrons,plus the number of neutrons,plus the number of protons 
A) number of neutrons only 
B) number of electrons plus the number of protons 
C) number of protons only 
D) number of protons plus the number of neutrons 
E) number of electrons,plus the number of neutrons,plus the number of protons

Question 14

The mass number of an atom is the:

Accepted Answer

A) number of neutrons only. 
B) the number of electrons plus the number of protons. 
C) the number of protons only. 
D) the number of protons plus the number of neutrons. 
E) the number of electrons,plus the number of neutrons,plus the number of protons. 
A) number of neutrons only. 
B) the number of electrons plus the number of protons. 
C) the number of protons only. 
D) the number of protons plus the number of neutrons. 
E) the number of electrons,plus the number of neutrons,plus the number of protons.

Question 15

The number of protons in the nucleus of an atom is called the __________________.

Accepted Answer

The answer of The number of protons in the nucleus...

Question 16

What is true about the half-life of 14C?

Accepted Answer

A) It takes 5,730 years for half of 14C to be converted to 14N. 
B) The half-life never changes over time. 
C) It can be employed in the radioisotopic dating of fossils. 
D) All of these are correct. 
A) It takes 5,730 years for half of 14C to be converted to 14N. 
B) The half-life never changes over time. 
C) It can be employed in the radioisotopic dating of fossils. 
D) All of these are correct.

Question 17

Cells contain chemical substances called ____________ that minimize changes in concentrations of H+ and OH-.

Accepted Answer

Question 18

Hydrogen bonds exist within a water molecule.

Accepted Answer

A) True 
 B)False

Question 19

A solution of pH 3 is 100 times more acidic than a solution of pH 5.

Accepted Answer

A) True 
 B)False

Question 20

Due to hydrogen bonding,ice is _______ dense than water.

Accepted Answer

The answer of Due to hydrogen bonding,ice is _______ dense...

Exam 2: The Chemistry of Life

Electrons possess energy of position,also known as _____________ energy.

Which is not correct about water molecules?

We use the __________ scale to measure concentrations of hydrogen ions in a solution.

Nonpolar compounds are said to be _________________ because they shrink away from contact with water.

The chemical bond within a water molecule is a ______ bond.

Which type of chemical bond exists within a water molecule?

Most elements in nature exist as:

If an element has an atomic number of 6 and a mass number of 14,how many neutrons does it have?

The high surface tension of water that allows some insects to literally walk on water is due to:

Discuss the difference between covalent,ionic and hydrogen bonds.

The first shell in any atom contains one orbital which may contain as many as

When an electron is transferred from one atom to the next,and the two atoms are then electrically attracted to one another,the type of bond is a(n)__________________ bond.

The atomic number of an atom is the:

The mass number of an atom is the:

The number of protons in the nucleus of an atom is called the __________________.

What is true about the half-life of 14C?

Cells contain chemical substances called ____________ that minimize changes in concentrations of H+ and OH-.

Hydrogen bonds exist within a water molecule.

A solution of pH 3 is 100 times more acidic than a solution of pH 5.

Due to hydrogen bonding,ice is _______ dense than water.

The Science of Biology

Molecules of Life

Cells

Energy and Life

Photosynthesis: Acquiring Energy From the Sun

How Cells Harvest Energy From Food

Mitosis

Meiosis

Foundations of Genetics

DNA: the Genetic Material

How Genes Work

Genomics and Biotechnology

Evolution and Natural Selection

How We Name Living Things

Prokaryotes: the First Single-Celled Creatures

Protists: Advent of the Eukaryotes

Fungi Invade the Land

Evolution of the Animal Phyla

History of the Vertebrates

How Humans Evolved

The Animal Body and How It Moves

Circulation

Respiration

The Path of Food Through the Animal Body

Maintaining the Internal Environment

How the Animal Body Defends Itself

The Nervous System

The Senses

Chemical Signaling Within the Animal Body

Reproduction and Development

Evolution of Plants

Plant Form and Function

Plant Reproduction and Growth

Populations and Communities

Ecosystems

Behavior and the Environment

Human Influences on the Living World

Filters

What is true about the half-life of ¹⁴C?

Cells contain chemical substances called ____________ that minimize changes in concentrations of H⁺ and OH^-.