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

Which of the following concept circles best depicts the relationship between molecules and compounds (c = compound and m = molecule)?

Accepted Answer

A)  Option A 
B)  Option B 
C)  Option C 
A)  Option A 
B)  Option B 
C)  Option C

Question 3

Draw several (5 or 6) individual, unbonded water molecules. Simulate what happens when table salt (Na+Cl-) is added to water. Use the model you created to explain why salt is added to the roads in a 'snowy', cold climate.

Accepted Answer

There is an attraction of positively cha

Question 4

Which statement is NOT true about subatomic particles?

Accepted Answer

A)  Protons are found in the nucleus. 
B)  Neutrons have no electrical charge. 
C)  Electrons contain much less mass than neutrons. 
D)  Electrons are found in orbitals around the nucleus. 
E)  All electrons in an atom contain the same amount of energy. 
A)  Protons are found in the nucleus. 
B)  Neutrons have no electrical charge. 
C)  Electrons contain much less mass than neutrons. 
D)  Electrons are found in orbitals around the nucleus. 
E)  All electrons in an atom contain the same amount of energy.

Question 5

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

Accepted Answer

A) True 
 B)False

Question 6

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

Question 7

Which of the following substances is hydrophilic?

Accepted Answer

A)  nonpolar substances 
B)  polar substances 
C)  ionic substances 
D)  both polar and ionic substances 
E)  All of the above are hydrophilic 
A)  nonpolar substances 
B)  polar substances 
C)  ionic substances 
D)  both polar and ionic substances 
E)  All of the above are hydrophilic

Question 8

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 9

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

Study of the chart confirms that as pH d

Question 10

Which is NOT true about the electrical charges in chemistry?

Accepted Answer

A)  Protons carry a positive charge. 
B)  In an atom, the number of protons and neutrons must be equal. 
C)  An atom is neutral when the positive and negative charges balance. 
D)  An ion contains one or more positive or negative charges. 
A)  Protons carry a positive charge. 
B)  In an atom, the number of protons and neutrons must be equal. 
C)  An atom is neutral when the positive and negative charges balance. 
D)  An ion contains one or more positive or negative charges.

Question 11

If you place the corner of a paper towel into a droplet of water the water moves across the paper towel. Which of the following would explain the movement of the water?

Accepted Answer

A)  surface tension 
B)  cohesion 
C)  adhesion 
D)  both cohesion and adhesion 
A)  surface tension 
B)  cohesion 
C)  adhesion 
D)  both cohesion and adhesion

Question 12

An atom's atomic mass is best described as the mass of

Accepted Answer

A)  the protons it contains. 
B)  the neutrons it contains. 
C)  electrons in the outermost shell. 
D)  protons and neutrons it contains. 
E)  protons and electrons it contains. 
A)  the protons it contains. 
B)  the neutrons it contains. 
C)  electrons in the outermost shell. 
D)  protons and neutrons it contains. 
E)  protons and electrons it contains.

Question 13

The blood buffer reactions described by H2CO3

H+ + HCO3- indicates that

Accepted Answer

A)  scientists are uncertain which direction the equation flows. 
B)  the reaction can flow either direction depending on whether there is an excess of hydrogen or hydroxide ions. 
C)  any reaction in one direction causes an immediate reverse reaction. 
D)  chemicals can swing wildly from acid to basic. 
E)  there is really no difference in chemistry whether a molecule is formed or dissociated. 
A)  scientists are uncertain which direction the equation flows. 
B)  the reaction can flow either direction depending on whether there is an excess of hydrogen or hydroxide ions. 
C)  any reaction in one direction causes an immediate reverse reaction. 
D)  chemicals can swing wildly from acid to basic. 
E)  there is really no difference in chemistry whether a molecule is formed or dissociated.

Question 14

Which of the following is/are an atom, an isotope and an ion?

Accepted Answer

A)  H+ 
B)  2H or deuterium 
C)  3H or tritium 
D)  H2 or hydrogen gas 
E)  All of the choices are atoms, isotopes and ions. 
A)  H+ 
B)  2H or deuterium 
C)  3H or tritium 
D)  H2 or hydrogen gas 
E)  All of the choices are atoms, isotopes and ions.

Question 15

Which statement is NOT true about ionic bonds?

Accepted Answer

A)  One atom acts as an electron donor and another atom acts as an electron acceptor. 
B)  Electrons are completely lost or gained in ion formation. 
C)  An ion has the same number of electrons as a nonionic atom of the same element. 
D)  An ionic bond occurs between positive ions and negative ions. 
E)  A salt such as NaCl is formed by an ionic reaction. 
A)  One atom acts as an electron donor and another atom acts as an electron acceptor. 
B)  Electrons are completely lost or gained in ion formation. 
C)  An ion has the same number of electrons as a nonionic atom of the same element. 
D)  An ionic bond occurs between positive ions and negative ions. 
E)  A salt such as NaCl is formed by an ionic reaction.

Question 16

To determine the age of fairly recent fossils and organic artifacts, it is possible to analyze the amounts of the isotopes 14C and 14N, because over time the 14C-which originated in the atmosphere-breaks down into 14N. What net change occurred for this to happen?

Accepted Answer

A)  The 14C lost an electron. 
B)  The 14C gained an electron. 
C)  The 14C lost a proton. 
D)  The 14C gained a proton. 
E)  The 14C gained a neutron. 
A)  The 14C lost an electron. 
B)  The 14C gained an electron. 
C)  The 14C lost a proton. 
D)  The 14C gained a proton. 
E)  The 14C gained a neutron.

Question 17

A coastal climate is moderated primarily by which of the following properties of water? Water

Accepted Answer

A)  is the universal solvent. 
B)  is cohesive and adhesive. 
C)  has a high heat of evaporation. 
D)  has a high surface tension. 
A)  is the universal solvent. 
B)  is cohesive and adhesive. 
C)  has a high heat of evaporation. 
D)  has a high surface tension.

Question 18

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 19

All living things are 70 - 90% water. Use this graph to explain what characteristics of water protect living organisms from rapid temperature changes.

Accepted Answer

Converting 1 gm of the hottest liquid wa

Question 20

An abandoned Indiana coal mine spoil bank contains chunks of pyrite minerals. Under constant erosion and weathering, the pyrites leech large amounts of sulfuric acid (H2SO4). The spoil banks are also mixed with large quantities of basic limestone and clay carbonates. What should occur over time?

Accepted Answer

A)  The pH level will drop until all acid has washed out. 
B)  The pH level will remain at 7.0 because of constant washing with rain. 
C)  The pH level will remain at 7.0 because all acid will be immediately neutralized by bases. 
D)  The pH levels will be spotty and vary over time, first more acidic but drifting back toward 7.0. 
E)  Bases always dominate over acids. 
A)  The pH level will drop until all acid has washed out. 
B)  The pH level will remain at 7.0 because of constant washing with rain. 
C)  The pH level will remain at 7.0 because all acid will be immediately neutralized by bases. 
D)  The pH levels will be spotty and vary over time, first more acidic but drifting back toward 7.0. 
E)  Bases always dominate over acids.

Exam 2: Basic Chemistry

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

Which of the following concept circles best depicts the relationship between molecules and compounds (c = compound and m = molecule)?

Draw several (5 or 6) individual, unbonded water molecules. Simulate what happens when table salt (Na+Cl-) is added to water. Use the model you created to explain why salt is added to the roads in a 'snowy', cold climate.

Which statement is NOT true about subatomic particles?

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

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

Which of the following substances is hydrophilic?

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

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 is NOT true about the electrical charges in chemistry?

If you place the corner of a paper towel into a droplet of water the water moves across the paper towel. Which of the following would explain the movement of the water?

An atom's atomic mass is best described as the mass of

The blood buffer reactions described by H2CO3 H+ + HCO3- indicates that

Which of the following is/are an atom, an isotope and an ion?

Which statement is NOT true about ionic bonds?

To determine the age of fairly recent fossils and organic artifacts, it is possible to analyze the amounts of the isotopes 14C and 14N, because over time the 14C-which originated in the atmosphere-breaks down into 14N. What net change occurred for this to happen?

A coastal climate is moderated primarily by which of the following properties of water? Water

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

All living things are 70 - 90% water. Use this graph to explain what characteristics of water protect living organisms from rapid temperature changes.

An abandoned Indiana coal mine spoil bank contains chunks of pyrite minerals. Under constant erosion and weathering, the pyrites leech large amounts of sulfuric acid (H2SO4). The spoil banks are also mixed with large quantities of basic limestone and clay carbonates. What should occur over time?

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: Structureand 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

Draw several (5 or 6) individual, unbonded water molecules. Simulate what happens when table salt (Na⁺Cl^-) is added to water. Use the model you created to explain why salt is added to the roads in a 'snowy', cold climate.

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.

The blood buffer reactions described by H₂CO₃ H⁺ + HCO₃- indicates that

To determine the age of fairly recent fossils and organic artifacts, it is possible to analyze the amounts of the isotopes ¹⁴C and ¹⁴N, because over time the ¹⁴C-which originated in the atmosphere-breaks down into ¹⁴N. What net change occurred for this to happen?

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