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.F) All of the above
G) D) and E)

Question 2

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.E) A) and D)
F) All of the above

Question 3

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)  hydrogenF) A) and B)
G) A) and C)

Question 4

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

Accepted Answer

A) True 
 B)False

Question 5

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.F) C) and D)
G) C) and E)

Question 6

Classify the following substances as either hydrophobic or hydrophilic:

Accepted Answer

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

Question 7

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

Accepted Answer

A) True 
 B)False

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+E) All of the above
F) B) and C)

Question 9

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

Accepted Answer

A)  CH4, Na+Cl-
B)  O2,CH4
C)  Na+Cl-,H2O
D)  H2O,N2E) All of the above
F) A) and D)

Question 10

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 11

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 12

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 13

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.E) All of the above
F) A) and C)

Question 14

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 15

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.E) C) and D)
F) A) and B)

Question 16

Human blood has a pH of about 7.4.This is

Accepted Answer

A)  neutral.
B)  very acidic.
C)  slightly acidic.
D)  slightly basic.E) A) and B)
F) A) and C)

Question 17

Which term refers to the attraction to water molecules?

Accepted Answer

A)  hydrophilic
B)  hydrophobic
C)  hydrolysis
D)  photolysis
E)  nitrophylicF) C) and D)
G) B) and D)

Question 18

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

Accepted Answer

A) True 
 B)False

Question 19

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

Accepted Answer

A) True 
 B)False

Question 20

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,#2E) A) and D)
F) C) and D)

Exam 2: Basic Chemistry

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

In a water molecule,

Correct AnswerverifiedShow Answer

Classify the following substances as either hydrophobic or hydrophilic:

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

As a solid,water floats.This means that

Correct AnswerverifiedShow Answer

Which term refers to the attraction to water molecules?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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.

Correct AnswerverifiedShow Answer

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.

Correct AnswerverifiedShow Answer

Human blood has a pH of about 7.4.This is

Correct AnswerverifiedShow Answer

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

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

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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

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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.

Correct Answer
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