Question 1

Which of the following statements is NOT true about electron configurations?

Accepted Answer

A) If an atom has only one shell,it is complete with two electrons. 
B) If an atom has two or more shells,the octet rule applies. 
C) If an atom has two or more shells,the outer shell is complete with eight electrons. 
D) Atoms with more than eight electrons in the outer shell react by gaining electrons. 
E) Atoms with eight electrons in the outer shell are not reactive at all. 
A) If an atom has only one shell,it is complete with two electrons. 
B) If an atom has two or more shells,the octet rule applies. 
C) If an atom has two or more shells,the outer shell is complete with eight electrons. 
D) Atoms with more than eight electrons in the outer shell react by gaining electrons. 
E) Atoms with eight electrons in the outer shell are not reactive at all.

Question 2

Anything below pH 7 is acidic and above pH 7 is basic.

Accepted Answer

A) True 
 B)False

Question 3

A research article indicates that researchers have used an isotope 3H to trace a certain metabolic process.From the symbol that is given,we know this is a hydrogen isotope with

Accepted Answer

A) three protons. 
B) three neutrons. 
C) three electrons. 
D) one proton and two neutrons. 
E) two protons and one neutron. 
A) three protons. 
B) three neutrons. 
C) three electrons. 
D) one proton and two neutrons. 
E) two protons and one neutron.

Question 4

Prior to prescription medications to control stomach acid and "heart burn" people consumed baking soda (sodium bicarbonate)to decrease their discomfort.This would indicate that sodium bicarbonate

Accepted Answer

A) effectively buffers stomach acid by releasing H+ 
B) should be sold as a prescription drug 
C) blocks acid production by combining with OH- 
D) neutralizes stomach acid by combining with excess H+ 
A) effectively buffers stomach acid by releasing H+ 
B) should be sold as a prescription drug 
C) blocks acid production by combining with OH- 
D) neutralizes stomach acid by combining with excess H+

Question 5

The electrons are unequally shared in _______,and transferred in __________.

Accepted Answer

A) CH4, Na+Cl- 
B) O2,CH4 
C) Na+Cl-,H2O 
D) H2O,N2 
A) CH4, Na+Cl- 
B) O2,CH4 
C) Na+Cl-,H2O 
D) H2O,N2

Question 6

pH 7 has a balanced level of H+ and OH-.

Accepted Answer

A) True 
 B)False

Question 7

Draw two hydrogen atoms using Bohr's model.Now bond them to form a molecule of hydrogen gas.Write the molecular formula.Explain what type of bond you've created and why this is a stable situation.

Accepted Answer

The answer of Draw two hydrogen atoms using Bohr's model.Now...

Question 8

Classify the following substances as either hydrophobic or hydrophilic:

Accepted Answer

The answer of Classify the following substances as either hydrophobic...

Question 9

Study the figures to determine which is liquid water and which is frozen water (ice).Explain your answer and predict if the water in Figure 2 would float or sink in the water in Figure 1.

Accepted Answer

The answer of Study the figures to determine which is...

Question 10

Use Bohr's model to draw a sodium (Na)atom and a chlorine (Cl)atom.Using your model,explain what happens when sodium reacts with chlorine to form table salt.Include in your explanation ion and ionic bond formation.Use your model to help you to decide whether NaCl is hydrophilic or hydrophobic.

Accepted Answer

The answer of Use Bohr's model to draw a sodium...

Question 11

As a solid,water floats.This means that

Accepted Answer

A) solid water is less dense than liquid water. 
B) organisms in ponds,lakes,and reservoirs can survive under the ice cover. 
C) this is due to hydrogen bonding changes. 
D) All of the choices are correct. 
A) solid water is less dense than liquid water. 
B) organisms in ponds,lakes,and reservoirs can survive under the ice cover. 
C) this is due to hydrogen bonding changes. 
D) All of the choices are correct.

Question 12

Human blood has a pH of about 7.4.This is

Accepted Answer

A) neutral. 
B) very acidic. 
C) slightly acidic. 
D) slightly basic. 
A) neutral. 
B) very acidic. 
C) slightly acidic. 
D) slightly basic.

Question 13

In a water molecule,

Accepted Answer

A) the oxygen atom is more electronegative than the hydrogen atoms. 
B) the oxygen atom has an overall negative charge with the hydrogen atoms having an overall positive charge. 
C) unequal sharing of electrons results in a polar molecule. 
D) All of the choices are correct. 
A) the oxygen atom is more electronegative than the hydrogen atoms. 
B) the oxygen atom has an overall negative charge with the hydrogen atoms having an overall positive charge. 
C) unequal sharing of electrons results in a polar molecule. 
D) All of the choices are correct.

Question 14

A change of one pH unit represents a ten-fold increase or decrease in hydroxyl ion concentration.

Accepted Answer

A) True 
 B)False

Question 15

The scale indicates the relative concentrations of hydrogen and hydroxyl ions in a solution.

Accepted Answer

A) True 
 B)False

Question 16

Which of the following elements would be more reactive with other elements?

Accepted Answer

A) boron,#5 
B) neon,#10 
C) argon,#18 
D) helium,#2 
A) boron,#5 
B) neon,#10 
C) argon,#18 
D) helium,#2

Question 17

The characteristic way in which atoms of an element react is most related to the

Accepted Answer

A) number of electrons in the outermost shell. 
B) number of electrons in the innermost shell. 
C) number of neutrons in the nucleus. 
D) size of the nucleus. 
A) number of electrons in the outermost shell. 
B) number of electrons in the innermost shell. 
C) number of neutrons in the nucleus. 
D) size of the nucleus.

Question 18

Which term refers to the attraction to water molecules?

Accepted Answer

A) hydrophilic 
B) hydrophobic 
C) hydrolysis 
D) photolysis 
E) nitrophylic 
A) hydrophilic 
B) hydrophobic 
C) hydrolysis 
D) photolysis 
E) nitrophylic

Question 19

Study the chart to determine the relationship between H+ concentration and pH.If you were to create a herbal remedy to decrease excess stomach acid,would you create a solution with a relatively greater or lesser number of hydrogen ions.

Accepted Answer

Question 20

Which of the following elements is NOT one of the six most common elements in living organisms?

Accepted Answer

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

Exam 2: Basic Chemistry

Which of the following statements is NOT true about electron configurations?

Anything below pH 7 is acidic and above pH 7 is basic.

A research article indicates that researchers have used an isotope 3H to trace a certain metabolic process.From the symbol that is given,we know this is a hydrogen isotope with

Prior to prescription medications to control stomach acid and "heart burn" people consumed baking soda (sodium bicarbonate)to decrease their discomfort.This would indicate that sodium bicarbonate

The electrons are unequally shared in _______,and transferred in __________.

pH 7 has a balanced level of H+ and OH-.

Draw two hydrogen atoms using Bohr's model.Now bond them to form a molecule of hydrogen gas.Write the molecular formula.Explain what type of bond you've created and why this is a stable situation.

Classify the following substances as either hydrophobic or hydrophilic:

Study the figures to determine which is liquid water and which is frozen water (ice).Explain your answer and predict if the water in Figure 2 would float or sink in the water in Figure 1.

Use Bohr's model to draw a sodium (Na)atom and a chlorine (Cl)atom.Using your model,explain what happens when sodium reacts with chlorine to form table salt.Include in your explanation ion and ionic bond formation.Use your model to help you to decide whether NaCl is hydrophilic or hydrophobic.

As a solid,water floats.This means that

Human blood has a pH of about 7.4.This is

In a water molecule,

A change of one pH unit represents a ten-fold increase or decrease in hydroxyl ion concentration.

The scale indicates the relative concentrations of hydrogen and hydroxyl ions in a solution.

Which of the following elements would be more reactive with other elements?

The characteristic way in which atoms of an element react is most related to the

Which term refers to the attraction to water molecules?

Study the chart to determine the relationship between H+ concentration and pH.If you were to create a herbal remedy to decrease excess stomach acid,would you create a solution with a relatively greater or lesser number of hydrogen ions.

Which of the following elements is NOT one of the six most common elements in living organisms?

A View of Life

The Chemistry of Organic Molecules

Cell Structure and Function

Membrane Structure and Function

Metabolism: Energy and Enzymes

Photosynthesis

Cellular Respiration

The Cell Cycle and Cellular Reproduction

Meiosis and Sexual Reproduction

Mendelian Patterns of Inheritance

Molecular Biology of the Gene

Regulation of Gene Expression

Biotechnology and Genomics

Darwin and Evolution

How Populations Evolve

Speciation and Macroevolution

Origin and History of Life

Taxonomy,systematics,and Phylogeny

Viruses,bacteria,and Archaea

Protist Evolution and Diversity

Fungi Evolution and Diversity

Plant Evolution and Diversity

Flowering Plants: Structure and Organization

Flowering Plants: Nutrition and Transport

Flowering Plants: Control of Growth Responses

Flowering Plants: Reproduction

Invertebrate Evolution

Vertebrate Evolution

Human Evolution

Animal Organization and Homeostasis

Circulation and Cardiovascular Systems

The Lymphatic and Immune Systems

Digestive Systems and Nutrition

Respiratory Systems

Body Fluid Regulation and Excretory Systems

Neurons and Nervous Systems

Sense Organs

Locomotion and Support Systems

Hormones and Endocrine Systems

Reproductive Systems

Animal Development

Behavioral Ecology

Population Ecology

Community and Ecosystem Ecology

Major Ecosystems of the Biosphere

Conservation of Biodiversity

Filters

A research article indicates that researchers have used an isotope ³H to trace a certain metabolic process.From the symbol that is given,we know this is a hydrogen isotope with

The electrons are unequally shared in _,and transferred in ____.

pH 7 has a balanced level of H⁺ and OH^-.

Study the chart to determine the relationship between H⁺ concentration and pH.If you were to create a herbal remedy to decrease excess stomach acid,would you create a solution with a relatively greater or lesser number of hydrogen ions.