Question 1

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

Accepted Answer

A)   Tl2O
B)   Tl2O3
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) C) and D)

Question 2

Silicon halides have stronger bonds than corresponding carbon halides. Which of the following is a possible explanation of this phenomenon?

Accepted Answer

A)   The larger silicon atoms permit better overlap of its atomic orbitals with those of the halogens than the smaller carbons atoms do.
B)   The large electronegativity difference between silicon and the halogens makes their bonds stronger than those of carbon.
C)   Silicon has the ability to form a partial double bond with a halogen through the overlap of its d-orbital with a p-orbital of the halogen.
D)   Silicon has a larger effective nuclear charge than carbon which allows it to bond more strongly to the more negative halogens than carbon.
E)   Carbon-halogen bonds are unusually weak.F) A) and D)
G) All of the above

Question 3

The elements from Groups 1A(1)  and 2A(2)  are

Accepted Answer

A)   strong acids.
B)   strong bases.
C)   amphoteric.
D)   strong oxidizing agents.
E)   strong reducing agents.F) B) and D)
G) A) and B)

Question 4

Select the element with the lowest first ionization energy.

Accepted Answer

A)   Se
B)   S
C)   Sn
D)   Sr
E)   HF) A) and B)
G) A) and C)

Question 5

Which of the following statements about the effective nuclear charge, Zeff, is correct?

Accepted Answer

A)   Zeff increases with the size of the atom.
B)   Zeff decreases across a period and increases down a group.
C)   Zeff increases across a period and is relatively constant down a group.
D)   Zeff increases as the value of the principal quantum number increases.
E)   Zeff is greater for hydrogen than for any other element.F) B) and D)
G) A) and E)

Question 6

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) C) and E)
G) B) and E)

Question 7

Phosphoric acid (H3PO4) is a strong acid.

Accepted Answer

A) True 
 B)False

Question 8

elements from Li to Cs?

Accepted Answer

A)   metallic character decreases
B)   electronegativity increases
C)   melting point increases
D)   first ionization energy increases
E)   chemical reactivity increasesF) B) and C)
G) B) and D)

Question 9

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) C) and D)
G) None of the above

Question 10

Which element forms compounds which are used to treat individuals suffering from manic-depressive disorders?

Accepted Answer

A)   fluorine
B)   lithium
C)   boron
D)   beryllium
E)   arsenicF) A) and B)
G) B) and E)

Question 11

What is the stable form of the element sulfur, at room temperature?

Accepted Answer

A)   atomic sulfur
B)   S2
C)   S4
D)   S6
E)   S8F) A) and E)
G) A) and B)

Exam 14: Periodic Patterns in the Main-Group Elements

Select the element with the lowest first ionization energy.

Correct Answer
verified

elements from Li to Cs?

Correct Answer
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Which of the following statements about the effective nuclear charge, Z_eff, is correct?

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

Correct Answer
verified

Silicon halides have stronger bonds than corresponding carbon halides. Which of the following is a possible explanation of this phenomenon?

Correct Answer
verified

Which element forms compounds which are used to treat individuals suffering from manic-depressive disorders?

Correct Answer
verified

The elements from Groups 1A(1) and 2A(2) are

Correct Answer
verified

Phosphoric acid (H₃PO₄) is a strong acid.

Correct Answer
verified

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

Correct Answer
verified

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 Answer
verified

What is the stable form of the element sulfur, at room temperature?

Correct Answer
verified

Exam 14: Periodic Patterns in the Main-Group Elements

Select the element with the lowest first ionization energy.

Correct AnswerverifiedShow Answer

elements from Li to Cs?

Correct AnswerverifiedShow Answer

Which of the following statements about the effective nuclear charge, Zeff, is correct?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Silicon halides have stronger bonds than corresponding carbon halides. Which of the following is a possible explanation of this phenomenon?

Correct AnswerverifiedShow Answer

Which element forms compounds which are used to treat individuals suffering from manic-depressive disorders?

Correct AnswerverifiedShow Answer

The elements from Groups 1A(1) and 2A(2) are

Correct AnswerverifiedShow Answer

Phosphoric acid (H3PO4) is a strong acid.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

What is the stable form of the element sulfur, at room temperature?

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Which of the following statements about the effective nuclear charge, Z_eff, is correct?

Correct Answer
verified

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

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Phosphoric acid (H₃PO₄) is a strong acid.

Correct Answer
verified

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

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified