Question 1

The bond in which of the following pairs of atoms would have the greatest percent ionic character (i.e., most polar)?

Accepted Answer

A) C - O 
B) S - O 
C) Na - I 
D) Na - Br 
E) F - F 
A) C - O 
B) S - O 
C) Na - I 
D) Na - Br 
E) F - F

Question 2

In the Lewis structure of the iodate ion, IO3-, that satisfies the octet rule, the formal charge on the central iodine atom is

Accepted Answer

A) +2 
B) +1 
C) 0 
D) -1 
E) -2 
A) +2 
B) +1 
C) 0 
D) -1 
E) -2

Question 3

The Lewis dot symbol for the chloride ion is

Accepted Answer

A)    
B)    - 
C)    - 
D)    - 
E) Cl- 
A)    
B)    - 
C)    - 
D)    - 
E) Cl-

Question 4

How many covalent bonds will be drawn to phosphorous in PO43- for the dot structure that expands the octet to minimize formal charge and if necessary places negative formal charges on the most electronegative atom(s).

Accepted Answer

A) 4 
B) 5 
C) 6 
D) 7 
E) 8 
A) 4 
B) 5 
C) 6 
D) 7 
E) 8

Question 5

Which molecule has a Lewis structure that does not obey the octet rule?

Accepted Answer

A) N2O 
B) CS2 
C) PH3 
D) CCl4 
E) NO2 
A) N2O 
B) CS2 
C) PH3 
D) CCl4 
E) NO2

Question 6

Write a Lewis structure for the chlorite ion, ClO2-, that obeys the octet rule, showing all non-zero formal charges, and give the total number of resonance structures for ClO2- that obey the octet rule.

Accepted Answer

@#IMG-DLM& Total number of res

Question 7

Of the species NO2, NO, and N2, only NO2 is an exception to the octet rule.

Accepted Answer

A) True 
 B)False

Question 8

Which of the elements listed below has the greatest electronegativity?

Accepted Answer

A) Mg 
B) Ga 
C) Si 
D) Ba 
E) Pb 
A) Mg 
B) Ga 
C) Si 
D) Ba 
E) Pb

Question 9

Which response includes all the molecules below that do not follow the octet rule? (1)H2S (2)BCl3 (3)PH3 (4)SF4

Accepted Answer

A) (2)and (4) 
B) (2)and (3) 
C) (1)and (2) 
D) (3)and (4) 
E) (1)and (4) 
A) (2)and (4) 
B) (2)and (3) 
C) (1)and (2) 
D) (3)and (4) 
E) (1)and (4)

Question 10

Which one of the following is most likely to be an ionic compound?

Accepted Answer

A) ClF3 
B) FeCl3 
C) NH3 
D) PF3 
E) SO3 
A) ClF3 
B) FeCl3 
C) NH3 
D) PF3 
E) SO3

Question 11

Write the Lewis structure of ammonia (nitrogen trihydride).

Accepted Answer

The answer of Write the Lewis structure of ammonia (nitrogen...

Question 12

Of the following substances, KCl, KBr, and KF, KF will have the highest melting point.

Accepted Answer

A) True 
 B)False

Question 13

Write the Lewis dot symbol for the chloride ion.

Accepted Answer

The answer of Write the Lewis dot symbol for the...

Question 14

Which of the following substances will display an incomplete octet in its Lewis structure?

Accepted Answer

A) CO2 
B) Cl2 
C) ICl 
D) NO 
E) SO2 
A) CO2 
B) Cl2 
C) ICl 
D) NO 
E) SO2

Question 15

Consider the hypothetical element X with electron-dot formula   Give the formula for the simplest compound this element forms with chlorine.

Accepted Answer

The answer of Consider the hypothetical element X with electron-dot...

Question 16

Assuming the octet rule is obeyed, how many covalent bonds will a carbon atom form to give a formal charge of zero?

Accepted Answer

A) 0 
B) 1 
C) 2 
D) 3 
E) 4 
A) 0 
B) 1 
C) 2 
D) 3 
E) 4

Question 17

Which one of the following is most likely to be a covalent compound?

Accepted Answer

A) KF 
B) CaCl2 
C) SF4 
D) Al2O3 
E) CaSO4 
A) KF 
B) CaCl2 
C) SF4 
D) Al2O3 
E) CaSO4

Question 18

BeF42- is called the fluoberyllate ion. The formal charge on the beryllium atom in this ion is

Accepted Answer

A) -2 
B) -1 
C) 0 
D) +1 
E) +2 
A) -2 
B) -1 
C) 0 
D) +1 
E) +2

Question 19

The number of resonance structures for the sulfur dioxide molecule that satisfy the octet rule is

Accepted Answer

A) 1 
B) 2 
C) 3 
D) 4 
E) None of these 
A) 1 
B) 2 
C) 3 
D) 4 
E) None of these

Question 20

Which one of the following molecules has an atom with an incomplete octet?

Accepted Answer

A) NF3 
B) H2O 
C) AsCl3 
D) GeH4 
E) BF3 
A) NF3 
B) H2O 
C) AsCl3 
D) GeH4 
E) BF3

Exam 9: Chemical Bonding I: Basic Concepts

The bond in which of the following pairs of atoms would have the greatest percent ionic character (i.e., most polar)?

In the Lewis structure of the iodate ion, IO3-, that satisfies the octet rule, the formal charge on the central iodine atom is

The Lewis dot symbol for the chloride ion is

How many covalent bonds will be drawn to phosphorous in PO43- for the dot structure that expands the octet to minimize formal charge and if necessary places negative formal charges on the most electronegative atom(s).

Which molecule has a Lewis structure that does not obey the octet rule?

Write a Lewis structure for the chlorite ion, ClO2-, that obeys the octet rule, showing all non-zero formal charges, and give the total number of resonance structures for ClO2- that obey the octet rule.

Of the species NO2, NO, and N2, only NO2 is an exception to the octet rule.

Which of the elements listed below has the greatest electronegativity?

Which response includes all the molecules below that do not follow the octet rule? (1)H2S (2)BCl3 (3)PH3 (4)SF4

Which one of the following is most likely to be an ionic compound?

Write the Lewis structure of ammonia (nitrogen trihydride).

Of the following substances, KCl, KBr, and KF, KF will have the highest melting point.

Write the Lewis dot symbol for the chloride ion.

Which of the following substances will display an incomplete octet in its Lewis structure?

Consider the hypothetical element X with electron-dot formula Give the formula for the simplest compound this element forms with chlorine.

Assuming the octet rule is obeyed, how many covalent bonds will a carbon atom form to give a formal charge of zero?

Which one of the following is most likely to be a covalent compound?

BeF42- is called the fluoberyllate ion. The formal charge on the beryllium atom in this ion is

The number of resonance structures for the sulfur dioxide molecule that satisfy the octet rule is

Which one of the following molecules has an atom with an incomplete octet?

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In the Lewis structure of the iodate ion, IO₃^-, that satisfies the octet rule, the formal charge on the central iodine atom is

How many covalent bonds will be drawn to phosphorous in PO₄^3- for the dot structure that expands the octet to minimize formal charge and if necessary places negative formal charges on the most electronegative atom(s).

Write a Lewis structure for the chlorite ion, ClO₂^-, that obeys the octet rule, showing all non-zero formal charges, and give the total number of resonance structures for ClO₂^- that obey the octet rule.

Of the species NO₂, NO, and N₂, only NO₂ is an exception to the octet rule.

Which response includes all the molecules below that do not follow the octet rule? (1)H₂S (2)BCl₃ (3)PH₃ (4)SF₄

BeF₄^2- is called the fluoberyllate ion. The formal charge on the beryllium atom in this ion is