Question 1

What is the charge on an alkali metal atom when it is in an ionic compound?

Accepted Answer

The answer of What is the charge on an alkali...

Question 2

Main group or representative elements are NOT found in which of the following groups?

Accepted Answer

A)  1
B)  2
C)  12
D)  13
E)  15

Question 3

Neuron cells generate electrical signals by concentration gradients across membranes.Assuming a potassium ion concentration of 0.00300 M inside the cell and a concentration of 0.135 M outside the cell, what is the electrical potential across the cell membrane? Body temperature is 310 K.The sign identifies the change in the electrical potential across the membrane and which way the ions flow.

Accepted Answer

A)  (+102 mV) 
B)  (-136 mV) 
C)  (+10.0 mV) 
D)  (-204 mV) 
E)  (+204 mV)

Question 4

Give an example of a halogen.

Accepted Answer

fluorine, chlorine, ...

Question 5

Essential elements

Accepted Answer

A)  are those with a beneficial physiological effect.
B)  are those required for combustion.
C)  are those, when missing, which impair function.
D)  are all transition metals.
E)  are those with a beneficial physiological effect and required for function.

Question 6

Which of the following is an alkali metal?

Accepted Answer

A)  K
B)  Mg
C)  Al
D)  Cu
E)  Ca

Question 7

Which part of the body is the enhancement of MRI images using isotopes of noble gases most effective?

Accepted Answer

A)  brain
B)  lungs
C)  pancreas
D)  lymph nodes
E)  heart

Question 8

Identify which element, potassium or bromine, has the larger electron affinity and explain why.

Accepted Answer

Bromine has the larger electron affinity...

Question 9

Elements in group 17 (VIIA)  are called

Accepted Answer

A)  alkali metals.
B)  transition metals.
C)  alkaline earth metals.
D)  halogens.
E)  chalcogens.

Question 10

Give an example of an alkali metal.

Accepted Answer

lithium, sodium, pot...

Question 11

Which halogen is a major essential element in the human body?

Accepted Answer

A)  fluorine
B)  chlorine
C)  bromine
D)  iodine
E)  No halogens are essential elements.

Question 12

The boiling point of H2O is 100°C, while that of H2S is -60°.This is due to

Accepted Answer

A)  increased dispersion forces in H2S.
B)  increased dispersion forces in H2O.
C)  hydrogen bonding.
D)  increased dipole-dipole forces in H2S.
E)  the greater molar mass of H2S.

Question 13

Arrange the following in order of increasing boiling point: Xe, Ar, Ne, F2, and Br2.

Accepted Answer

Ne

F₂

Ar

Xe

Br₂...

Question 14

Sodium is best described as a

Accepted Answer

A)  metalloid.
B)  metal.
C)  transition metal.
D)  noble gas.
E)  nonmetal.

Question 15

In comparison with their alcohol counterparts, thiols display characteristic odors.This is NOT due to which of the following factors?

Accepted Answer

A)  different shapes
B)  different polarity
C)  different electron distribution
D)  different size
E)  different molar mass

Question 16

What is meant by volatile sulfur compound? Give an example.

Accepted Answer

These compounds are volatile l...

Question 17

The first ionization energies of phosphorus and of sulfur are 1012 and 1000 kJ/mol.Why is IE1 for S lower than that of P when the usual trend is for IE to increase across a row?

Accepted Answer

A)  Zeff decreases from left to right on the periodic table.
B)  Sulfur is smaller than phosphorus.
C)  More electrons in a subshell decreases orbital energy.
D)  An electron from phosphorus must be removed from a lower-energy subshell.
E)  Removing an electron from sulfur reduces electron-electron repulsions.

Question 18

Urea is a waste product produced when the body metabolizes protein.What is the oxidation number of nitrogen in urea, (NH2) 2CO?

Accepted Answer

A)  (+3) 
B)  (-3) 
C)  1
D)  (-1) 
E)  (-4)

Question 19

What radiometric technique is used to produce images of the brain?

Accepted Answer

positron e...

Question 20

Which of the following is an essential element, but not a trace or ultratrace element?

Accepted Answer

A)  phosphorus
B)  silicon
C)  fluorine
D)  selenium
E)  iodine

Exam 22: The Main Group Elements Life and the Periodic Table

Elements in group 17 (VIIA) are called

Correct Answer
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Which part of the body is the enhancement of MRI images using isotopes of noble gases most effective?

Correct Answer
verified

Which halogen is a major essential element in the human body?

Correct Answer
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Arrange the following in order of increasing boiling point: Xe, Ar, Ne, F₂, and Br₂.

Correct Answer
verified
Ne F₂ Ar Xe Br₂...
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The boiling point of H₂O is 100°C, while that of H₂S is -60°.This is due to

Correct Answer
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What is meant by volatile sulfur compound? Give an example.

Correct Answer
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These compounds are volatile l...
View Answer

Give an example of a halogen.

Correct Answer
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fluorine, chlorine, ...
View Answer

The first ionization energies of phosphorus and of sulfur are 1012 and 1000 kJ/mol.Why is IE₁ for S lower than that of P when the usual trend is for IE to increase across a row?

Correct Answer
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Which of the following is an alkali metal?

Correct Answer
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Identify which element, potassium or bromine, has the larger electron affinity and explain why.

Correct Answer
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Bromine has the larger electron affinity...
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In comparison with their alcohol counterparts, thiols display characteristic odors.This is NOT due to which of the following factors?

Correct Answer
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Main group or representative elements are NOT found in which of the following groups?

Correct Answer
verified

What is the charge on an alkali metal atom when it is in an ionic compound?

Correct Answer
verified

Correct Answer
verified

Give an example of an alkali metal.

Correct Answer
verified
lithium, sodium, pot...
View Answer

Sodium is best described as a

Correct Answer
verified

Urea is a waste product produced when the body metabolizes protein.What is the oxidation number of nitrogen in urea, (NH₂) ₂CO?

Correct Answer
verified

What radiometric technique is used to produce images of the brain?

Correct Answer
verified
positron e...
View Answer

Essential elements

Correct Answer
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Which of the following is an essential element, but not a trace or ultratrace element?

Correct Answer
verified

Exam 22: The Main Group Elements Life and the Periodic Table

Elements in group 17 (VIIA) are called

Correct AnswerverifiedShow Answer

Which part of the body is the enhancement of MRI images using isotopes of noble gases most effective?

Correct AnswerverifiedShow Answer

Which halogen is a major essential element in the human body?

Correct AnswerverifiedShow Answer

Arrange the following in order of increasing boiling point: Xe, Ar, Ne, F2, and Br2.

Correct AnswerverifiedNe F2 Ar Xe Br2...View AnswerShow Answer

The boiling point of H2O is 100°C, while that of H2S is -60°.This is due to

Correct AnswerverifiedShow Answer

What is meant by volatile sulfur compound? Give an example.

Correct AnswerverifiedThese compounds are volatile l...View AnswerShow Answer

Give an example of a halogen.

Correct Answerverifiedfluorine, chlorine, ...View AnswerShow Answer

The first ionization energies of phosphorus and of sulfur are 1012 and 1000 kJ/mol.Why is IE1 for S lower than that of P when the usual trend is for IE to increase across a row?

Correct AnswerverifiedShow Answer

Which of the following is an alkali metal?

Correct AnswerverifiedShow Answer

Identify which element, potassium or bromine, has the larger electron affinity and explain why.

Correct AnswerverifiedBromine has the larger electron affinity...View AnswerShow Answer

In comparison with their alcohol counterparts, thiols display characteristic odors.This is NOT due to which of the following factors?

Correct AnswerverifiedShow Answer

Main group or representative elements are NOT found in which of the following groups?

Correct AnswerverifiedShow Answer

What is the charge on an alkali metal atom when it is in an ionic compound?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Give an example of an alkali metal.

Correct Answerverifiedlithium, sodium, pot...View AnswerShow Answer

Sodium is best described as a

Correct AnswerverifiedShow Answer

Urea is a waste product produced when the body metabolizes protein.What is the oxidation number of nitrogen in urea, (NH2) 2CO?

Correct AnswerverifiedShow Answer

What radiometric technique is used to produce images of the brain?

Correct Answerverifiedpositron e...View AnswerShow Answer

Essential elements

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Which of the following is an essential element, but not a trace or ultratrace element?

Correct AnswerverifiedShow Answer

Correct Answer
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Correct Answer
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Correct Answer
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Arrange the following in order of increasing boiling point: Xe, Ar, Ne, F₂, and Br₂.

Correct Answer
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Ne F₂ Ar Xe Br₂...
View Answer

The boiling point of H₂O is 100°C, while that of H₂S is -60°.This is due to

Correct Answer
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Correct Answer
verified
These compounds are volatile l...
View Answer

Correct Answer
verified
fluorine, chlorine, ...
View Answer

The first ionization energies of phosphorus and of sulfur are 1012 and 1000 kJ/mol.Why is IE₁ for S lower than that of P when the usual trend is for IE to increase across a row?

Correct Answer
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Correct Answer
verified

Correct Answer
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Bromine has the larger electron affinity...
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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lithium, sodium, pot...
View Answer

Correct Answer
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Urea is a waste product produced when the body metabolizes protein.What is the oxidation number of nitrogen in urea, (NH₂) ₂CO?

Correct Answer
verified

Correct Answer
verified
positron e...
View Answer

Correct Answer
verified

Correct Answer
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