Question 1

Certain Period 2 elements exhibit behaviors similar to Period 3 elements immediately below and to the right. One of the interesting diagonal relationships occurs between boron and silicon. Which of the following is one of their similarities?

Accepted Answer

A)  Both exhibit electrical properties of a conductor.
B)  The oxoanions of both elements occur in extended ionic networks.
C)  Both elements form compounds (boranes and silanes) that are good oxidizing agents.
D)  Boric acid and silicic acid occur in layers with widespread hydrogen bonding.
E)  Both elements are unusually soft solids.F) B) and C)
G) C) and E)

Question 2

Which of the following pure substances will not participate in hydrogen bonding?

Accepted Answer

A)  CH 3NH 2
B)  CH 3CH 2OCH 2CH 3
C)  CH 3CH 2OH
D)  HF
E)  H 2O 2F) None of the above
G) All of the above B

Question 3

The hydride ion

Accepted Answer

A)  is a strong acid.
B)  is a strong reducing agent.
C)  is a strong oxidizing agent.
D)  is neither an oxidant nor a reductant.
E)  is found in molecules such as CHCl3.F) A) and B)
G) None of the above

Question 4

The smallest ionization energies are found in the __________ __________ region of the periodic table.

Accepted Answer

A)  upper right
B)  upper left
C)  lower right
D)  lower left
E)  transition element ( d-block) F) B) and E)
G) B) and D)

Question 5

Predict the products for the following set of reactants. Cs(s)  + Br2(l)  →

Accepted Answer

A)  CsBr( s) 
B)  CsBr 2( s) 
C)  CsBr( l) 
D)  CsBr 2( l) 
E)  Cs 2Br( s) F) A) and C)
G) A) and E)

Question 6

Thallium can form two oxides, Tl2O and Tl2O3. Which will be the more basic substance?

Accepted Answer

A)  Tl 2O
B)  Tl 2O 3
C)  They have the same strength as bases.
D)  Neither compound has any acidic or basic properties.
E)  More information is needed to make an accurate prediction.F) B) and D)
G) A) and B)

Question 7

Which of the following pairs of elements exhibit similar physical and chemical behaviors ("diagonal relationships") ?

Accepted Answer

A)  H and Be
B)  Na and Be
C)  Be and Al
D)  B and Mg
E)  Li and AlF) A) and B)
G) D) and E) C

Question 8

Potassium is a strong reducing agent.

Accepted Answer

A) True 
 B)False

Question 9

Sulfur hexafluoride is a pollutant responsible for acid rain.

Accepted Answer

A) True 
 B)False

Question 10

One important feature of the chemistry of carbon is

Accepted Answer

A)  its large radius that allows other atoms to fit easily around it.
B)  its low electronegativity that allows it to ionize easily.
C)  its amphoteric behavior.
D)  its ability to form multiple bonds with hydrogen.
E)  its ability to catenate.F) C) and E)
G) A) and D)

Question 11

The most basic oxides contain elements from the __________ __________ region of the periodic table.

Accepted Answer

A)  upper right
B)  upper left
C)  lower right
D)  lower left
E)  transition element ( d-block) F) A) and B)
G) B) and D)

Question 12

Select the element with the lowest first ionization energy.

Accepted Answer

A)  Se
B)  S
C)  Sn
D)  Sr
E)  HF) D) and E)
G) All of the above

Question 13

Predict the products for the following set of reactants. Cl2(g)  + I−(aq)  →

Accepted Answer

A)  ICl
B)  ICl 2
C)  ICl 3
D)  I 2 + Cl −
E)  I + Cl 2 −F) A) and E)
G) A) and D)

Question 14

The basic character of the binary oxides XmOn

Accepted Answer

A)  is greatest when X has a low atomic number.
B)  is greatest when X is a nonmetal.
C)  increases as the oxidation number of X increases.
D)  increases as the oxidation number of X decreases.
E)  is unaffected by the oxidation number of X.F) B) and D)
G) B) and E)

Question 15

According to the phase diagram of carbon, what pressure and temperature conditions, if any, are needed in order for diamond to be the stable phase?

Accepted Answer

A)  Low pressure, low temperature
B)  Low pressure, high temperature
C)  High pressure, low temperature
D)  High pressure, high temperature
E)  Actually, diamond is not stable under any conditions.F) All of the above
G) None of the above

Question 16

Which one of the following elements is likely to exhibit the most violent and rapid reaction with water?

Accepted Answer

A)  Na
B)  Rb
C)  Mg
D)  Sr
E)  Cl 2F) B) and D)
G) A) and E) B

Question 17

Boron has 3 valence electrons. Which of the following processes is involved in boron's achieving a complete outer shell?

Accepted Answer

A)  Formation of a B 3+ cation
B)  Formation of bridge bonds
C)  Formation of π -bonds using its d-orbitals
D)  Formation of π -bonds using sp 3-orbitals
E)  None of these choices are correct.F) All of the above
G) B) and E)

Question 18

Predict the products for the reaction of the following set of reactants. MgCO3(s)  + heat →

Accepted Answer

A)  Mg( s) + CO( g) 
B)  Mg( s) + CO 2( g) 
C)  MgO( s) + CO( g) 
D)  MgO( s) + CO 2( g) 
E)  no reactionF) A) and B)
G) None of the above

Question 19

Certain Period 2 elements exhibit behaviors similar to Period 3 elements immediately below and to the right. One of these interesting diagonal relationships occurs between beryllium and aluminum. Which of the following is one of their differences?

Accepted Answer

A)  Some aluminum compounds and all beryllium compounds show significant covalent character in the gas phase.
B)  Beryllium forms bridge bonds in its hydrides while aluminum does not.
C)  Both form oxides that are impervious to reaction with water.
D)  The cations for both strongly polarize nearby electron clouds.
E)  Beryllium occurs in nature as the uncombined element, whereas aluminum does not.F) A) and D)
G) None of the above

Question 20

The atomic radius of sodium is 186 pm and of chlorine is 100 pm. The ionic radius for Na+ is 102 pm and for Cl− is 181 pm. In going from Na to Cl in Period 3, why does the atomic radius decrease while the ionic radius increases?

Accepted Answer

A)  The inner electrons in the sodium cation shield its valence electrons more effectively than the inner electrons in the chloride anion do.
B)  The inner electrons shield the valence electrons more effectively in the chlorine atom than in the chloride anion.
C)  The outermost electrons in chloride experience a smaller effective nuclear charge than those in the sodium cation do.
D)  The outermost electrons in chloride experience a larger effective nuclear charge than those in the sodium cation do.
E)  Monatomic ions are bigger than the atoms from which they are formed.F) B) and C)
G) A) and E)

Exam 14: Periodic Patterns in the Main-Group Elements

Certain Period 2 elements exhibit behaviors similar to Period 3 elements immediately below and to the right. One of the interesting diagonal relationships occurs between boron and silicon. Which of the following is one of their similarities?

Correct AnswerverifiedShow Answer

Which of the following pure substances will not participate in hydrogen bonding?

Correct AnswerverifiedB

The hydride ion

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The smallest ionization energies are found in the __________ __________ region of the periodic table.

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Predict the products for the following set of reactants. Cs(s) + Br2(l) →

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Thallium can form two oxides, Tl2O and Tl2O3. Which will be the more basic substance?

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Which of the following pairs of elements exhibit similar physical and chemical behaviors ("diagonal relationships") ?

Correct AnswerverifiedC

Potassium is a strong reducing agent.

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Sulfur hexafluoride is a pollutant responsible for acid rain.

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One important feature of the chemistry of carbon is

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The most basic oxides contain elements from the __________ __________ region of the periodic table.

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Select the element with the lowest first ionization energy.

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Predict the products for the following set of reactants. Cl2(g) + I−(aq) →

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The basic character of the binary oxides XmOn

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According to the phase diagram of carbon, what pressure and temperature conditions, if any, are needed in order for diamond to be the stable phase?

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Which one of the following elements is likely to exhibit the most violent and rapid reaction with water?

Correct AnswerverifiedB

Boron has 3 valence electrons. Which of the following processes is involved in boron's achieving a complete outer shell?

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Predict the products for the reaction of the following set of reactants. MgCO3(s) + heat →

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Certain Period 2 elements exhibit behaviors similar to Period 3 elements immediately below and to the right. One of these interesting diagonal relationships occurs between beryllium and aluminum. Which of the following is one of their differences?

Correct AnswerverifiedShow Answer

The atomic radius of sodium is 186 pm and of chlorine is 100 pm. The ionic radius for Na+ is 102 pm and for Cl− is 181 pm. In going from Na to Cl in Period 3, why does the atomic radius decrease while the ionic radius increases?

Correct AnswerverifiedShow Answer

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B

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The smallest ionization energies are found in the region of the periodic table.

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Predict the products for the following set of reactants. Cs(s) + Br₂(l) →

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Thallium can form two oxides, Tl₂O and Tl₂O₃. Which will be the more basic substance?

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C

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The most basic oxides contain elements from the region of the periodic table.

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Predict the products for the following set of reactants. Cl₂(g) + I⁻(aq) →

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The basic character of the binary oxides X_mO_n

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B

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Predict the products for the reaction of the following set of reactants. MgCO₃(s) + heat →

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The atomic radius of sodium is 186 pm and of chlorine is 100 pm. The ionic radius for Na⁺ is 102 pm and for Cl⁻ is 181 pm. In going from Na to Cl in Period 3, why does the atomic radius decrease while the ionic radius increases?

Correct Answer
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