Question 1

What is the formal charge on the chlorine atom in the chlorate ion,ClO3-,in the Lewis dot formula that minimizes formal charge?

Accepted Answer

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

Question 2

All of the following species are isoelectronic except

Accepted Answer

A) O- 
B) Ne 
C) N3- 
D) Mg2+ 
E) F- 
A) O- 
B) Ne 
C) N3- 
D) Mg2+ 
E) F- A

Question 3

Which one of the following species is best described by writing three equivalent Lewis formulas?

Accepted Answer

A) SO3 
B) SF4 
C) SO42- 
D) SO32- 
E) SOF4 
A) SO3 
B) SF4 
C) SO42- 
D) SO32- 
E) SOF4 A

Question 4

For which of the following pairs of species is the difference in radius the greatest?

Accepted Answer

A) C and F 
B) K+ and Br- 
C) Li+ and I- 
D) Na and Mg 
E) O2- and F- 
A) C and F 
B) K+ and Br- 
C) Li+ and I- 
D) Na and Mg 
E) O2- and F-

Question 5

The concept of resonance describes molecular structures

Accepted Answer

A) that have several different geometric arrangements. 
B) that have delocalized bonding. 
C) that are formed from hybridized orbitals. 
D) that have different molecular formulas. 
E) that have electrons resonating. 
A) that have several different geometric arrangements. 
B) that have delocalized bonding. 
C) that are formed from hybridized orbitals. 
D) that have different molecular formulas. 
E) that have electrons resonating.

Question 6

The number of valence electrons in the nitrite ion is

Accepted Answer

A) 22. 
B) 16. 
C) 23. 
D) 18. 
E) 24. 
A) 22. 
B) 16. 
C) 23. 
D) 18. 
E) 24.

Question 7

The Cr2+ ion would be expected to have ____ unpaired electrons.

Accepted Answer

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

Question 8

The Lewis structure for each of the following species except ____ contains a triple bond.

Accepted Answer

A) N3- 
B) N2 
C) HCCH 
D) NO+ 
E) O22+ 
A) N3- 
B) N2 
C) HCCH 
D) NO+ 
E) O22+

Question 9

What is the total number of valence electrons in the sulfite ion?

Accepted Answer

A) 30 
B) 26 
C) 24 
D) 8 
E) 32 
A) 30 
B) 26 
C) 24 
D) 8 
E) 32

Question 10

Which of the following species has the shortest bond distance?

Accepted Answer

A) F2 
B) Cl2 
C) Br2 
D) I2 
E) H2 
A) F2 
B) Cl2 
C) Br2 
D) I2 
E) H2

Question 11

Which Lewis dot formula for pyrophosphate,P2O74-,minimizes formal charge?

Accepted Answer

A)    
B)    
C)    
D)    
E)    
A)    
B)    
C)    
D)    
E)

Question 12

What is the correct Lewis dot formula for sulfuric acid,H2SO4,that minimizes formal charge?

Accepted Answer

A)    
B)    
C)    
D)    
E)    
A)    
B)    
C)    
D)    
E)

Question 13

Which of the following species would you expect to have the largest radius?

Accepted Answer

A) S2- 
B) P 
C) ​Na+ 
D) ​Se2- 
E) ​Ca2+ 
A) S2- 
B) P 
C) ​Na+ 
D) ​Se2- 
E) ​Ca2+

Question 14

Which of the following is the Lewis dot structure for the potassium ion?

Accepted Answer

A)    
B) ​   
C) ​   
D) ​   
E) ​   
A)    
B) ​   
C) ​   
D) ​   
E) ​

Question 15

In the Lewis formula for hydrazinium ion,N2H5+,the total number of lone electron pairs around the two nitrogen atoms is

Accepted Answer

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

Question 16

Which of the following is the best explanation for a covalent bond?

Accepted Answer

A) electrons simultaneously attracted by more than one nucleus 
B) an interaction between outer electrons 
C) the overlapping of unoccupied orbitals of two or more atoms 
D) the overlapping of two electron-filled orbitals having different energies 
E) a positive ion attracting negative ions 
A) electrons simultaneously attracted by more than one nucleus 
B) an interaction between outer electrons 
C) the overlapping of unoccupied orbitals of two or more atoms 
D) the overlapping of two electron-filled orbitals having different energies 
E) a positive ion attracting negative ions

Question 17

In the Lewis formula for difluorodiazine,N2F2,the total number of lone electron pairs around the two nitrogen atoms is

Accepted Answer

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

Question 18

A bond in which both electrons of the bond are donated by one atom is called ____.

Accepted Answer

A) a coordinate covalent bond 
B) a polar covalent bond 
C) an ionic bond 
D) a double bond 
E) a triple bond 
A) a coordinate covalent bond 
B) a polar covalent bond 
C) an ionic bond 
D) a double bond 
E) a triple bond

Question 19

Which of the following atoms is the most electronegative?

Accepted Answer

A) B 
B) N 
C) Al 
D) Cs 
E) Na 
A) B 
B) N 
C) Al 
D) Cs 
E) Na

Question 20

In the Lewis dot formula for the bromate ion (BrO3-)that minimizes formal charge,the central atom is surrounded by

Accepted Answer

A) two bonding pairs and two lone pairs of electrons. 
B) four bonding pairs and one lone pair of electrons. 
C) three bonding pairs and no lone pairs of electrons. 
D) five bonding pairs and one lone pair of electrons. 
E) three bonding pairs and one lone pair of electrons. 
A) two bonding pairs and two lone pairs of electrons. 
B) four bonding pairs and one lone pair of electrons. 
C) three bonding pairs and no lone pairs of electrons. 
D) five bonding pairs and one lone pair of electrons. 
E) three bonding pairs and one lone pair of electrons.

Exam 9: Ionic and Covalent Bonding

What is the formal charge on the chlorine atom in the chlorate ion,ClO3-,in the Lewis dot formula that minimizes formal charge?

All of the following species are isoelectronic except

Which one of the following species is best described by writing three equivalent Lewis formulas?

For which of the following pairs of species is the difference in radius the greatest?

The concept of resonance describes molecular structures

The number of valence electrons in the nitrite ion is

The Cr2+ ion would be expected to have ____ unpaired electrons.

The Lewis structure for each of the following species except ____ contains a triple bond.

What is the total number of valence electrons in the sulfite ion?

Which of the following species has the shortest bond distance?

Which Lewis dot formula for pyrophosphate,P2O74-,minimizes formal charge?

What is the correct Lewis dot formula for sulfuric acid,H2SO4,that minimizes formal charge?

Which of the following species would you expect to have the largest radius?

Which of the following is the Lewis dot structure for the potassium ion?

In the Lewis formula for hydrazinium ion,N2H5+,the total number of lone electron pairs around the two nitrogen atoms is

Which of the following is the best explanation for a covalent bond?

In the Lewis formula for difluorodiazine,N2F2,the total number of lone electron pairs around the two nitrogen atoms is

A bond in which both electrons of the bond are donated by one atom is called ____.

Which of the following atoms is the most electronegative?

In the Lewis dot formula for the bromate ion (BrO3-)that minimizes formal charge,the central atom is surrounded by

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Filters

What is the formal charge on the chlorine atom in the chlorate ion,ClO₃^-,in the Lewis dot formula that minimizes formal charge?

The Cr²⁺ ion would be expected to have ____ unpaired electrons.

Which Lewis dot formula for pyrophosphate,P₂O₇^4-,minimizes formal charge?

What is the correct Lewis dot formula for sulfuric acid,H₂SO₄,that minimizes formal charge?

In the Lewis formula for hydrazinium ion,N₂H₅⁺,the total number of lone electron pairs around the two nitrogen atoms is

In the Lewis formula for difluorodiazine,N₂F₂,the total number of lone electron pairs around the two nitrogen atoms is

In the Lewis dot formula for the bromate ion (BrO₃^-)that minimizes formal charge,the central atom is surrounded by