Deck 1: Remembering General Chemistry: Electronic Structure and Bonding

Question 1

How many degenerate p orbitals are in the second shell?

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

Answer 1

3

Question 2

Which of the following statements correctly describes the third shell that surrounds the nucleus of an atom?

A) The third shell contains only s and p atomic orbitals.
B) The maximum number of electrons that can occupy the third shell is 18.
C) The total number of atomic orbitals present in the third shell is 16.
D) The third shell can contain f orbitals.
E) All third shell elements must have d electrons.

Answer 2

The maximum number of electrons that can occupy the third shell is 18.

Question 3

What is the electronic configuration of N₃^-?

A) $1 s ^ { 2 } 2 s^2$
B) $1 s ^ { 2 } 2 s ^ { 2 } 2 p ^ { 3 }$
C) $1 s ^ { 2 } 2 s ^ { 2 } 2 p ^ { 4 }$
D) $1 s ^ { 2 } 2 s ^ { 2 } 2 p ^ { 6 }$
E) $1 s ^ { 2 } 2 s ^ { 2 } 2 p ^ { 6 } 3 s ^ { 1 }$

Answer 3

$1 s ^ { 2 } 2 s ^ { 2 } 2 p ^ { 6 }$

Question 4

What are the formal charges on nitrogen and on the starred oxygen in the following species?

A) $\mathrm { N } = - 1 , \mathrm { O } = 0$
B) $\mathrm { N } = + 1 , \mathrm { O } = - 1$
C) $\mathrm { N } = + 1 , \mathrm { O } = + 1$
D) $\mathrm { N } = - 1 , \mathrm { O } = - 1$
E) $\mathrm { N } = + 1 , \mathrm { O } = 0$

Question 5

The formal charge on nitrogen in the following compound is ________.

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

Question 6

What is the hybridization of the indicated atom ?

A) sp
B) sp²
C) sp³
D) none of the above

Question 7

Which of the following is the electronic configuration of the element Fe?

A) $1 s ^ { 2 } 2 s ^ { 2 } 2 p ^ { 6 } 3 s ^ { 2 } 3 p ^ { 6 } 4 s ^ { 2 } 3 d ^6$
B) $1 s ^ { 2 } 2 s^2 2p^6 3 s ^ { 2 } 3 p^8 3d ^6$
C) $1 s ^ { 2 } 2s^22p^83s^23p^64s^23d^6$
D) $1 s ^ { 2 } 2 s^22p^63s^23p^64s^24d^6$
E) $1 s ^ { 2 } 2 s^22 p^63 s^23 p^64 s^24 p^6$

Question 8

Which of the following contains polar covalent bonds?

A) NH₃
B) Na₂O
C) H₂
D) KF
E) both A and C

Question 9

What element is represented by the following electronic configuration? $$1 s ^ { 2 } 2 s ^ { 2 } 2 p ^ { 5 }$$

A) F
B) C
C) N
D) Al
E) O

Question 10

Which of the following Lewis structures is correct for $\mathrm { CH } _ { 2 } \mathrm {~N} _ { 2 }$ ?

A) $\text { : } \mathrm { CH } _ { 2 } - \mathrm { N } = \mathrm { N } :$
B)
C)
D)
E)

Question 11

Which of the following atoms is the least electronegative?

A) P
B) Na
C) I
D) B
E) O

Question 12

Which of the following compounds have bonds that are predominantly ionic?

A) KCl
B) CF₄
C) NH₃
D) both A and B
E) both B and C

Question 13

How many nonbonding pairs of electrons are H₂NOH

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

Question 14

What type of bonding is found $\mathrm { CH } _ { 3 } \mathrm { CH } _ { 2 } \mathrm { CH } _ { 2 } \mathrm { CH } _ { 2 } \mathrm { CH } _ { 2 } \mathrm { CH } _ { 3 }$ ?

A) ionic
B) hydrogen
C) covalent
D) polar

Question 15

Which of the following covalent bonds has the largest dipole moment?

A) C-C
B) C-H
C) C-O
D) H-N
E) H-F

Question 16

The atomic number of boron is 5. The correct electronic configuration of boron is ________.

A) $1 s ^ { 2 } 2 s 3$
B) $1 s ^ { 2 } 2 p 3$
C) $1 s ^ { 2 } 2 s^22 p^1$
D) $2 s ^ { 2 } 2 p 3$
E) $1 s ^ { 2 } 2 s^23 s^1$

Question 17

What is the formal charge on the nitrogen in the ammonium ion?

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

Question 18

Which of the following is the most likely Lewis structure for C₂H₂?

A)

B)

C)

D)

E)

Question 19

The compound CH₃NH₂, contains a C-N bond. Which of the following best describes the charge on the nitrogen atom in this compound?

A) $+ 1$
B) slightly positive
C) uncharged
D) slightly negative
E) $- 1$

Question 20

How many unpaired electrons are present in the electronic configuation of carbon (atomic number =6)?

A) none
B) one
C) two
D) three
E) four

Question 21

The N $\mathrm { N } - \mathrm { H } \text { bond in the ammonium ion, } { } ^ { + } \mathrm { NH } _ { 4 }$ , is formed by the overlap of what two orbitals?

A) sp³-sp³
B) sp³-sp²
C) sp²-sp²
D) sp²-s
E) sp³-s

Question 22

Are all the carbons in this structure in the same plane?

A) Yes
B) No

Question 23

How many sp carbons are in the following compound? $$\mathrm { H } _ { 3 } \mathrm { C } - \mathrm { C } \equiv \mathrm { C } - \mathrm { H }$$

A) Zero
B) One
C) Two
D) Three

Question 24

What is the bond angle and hybridization of the carbon in ⁺CH₃ ?

A)120°, sp²
B) 120°, sp³
C) 109.5°, sp²
D) 120°, sp²
E) 109.5°, sp³

Question 25

Which of the following has an sp² carbon?

A) $\begin{array} { l } \oplus \\\mathrm { CH } _ { 3 }\end{array}$
B) $\cdot \mathrm { CH } _ { 3 }$
C)
D) A and B
E) A, B and C

Question 26

How many sp² hybridized atoms are in the following compound?

A) Two
B) Three
C) Four
D) Five
E) Six

Question 27

Which carbons in the following compound are sp hybridized?

A) carbon 1
B) carbon 2
C) carbons 1, 3
D) carbons 4
E) carbons 4, 5

Question 28

How many carbon-carbon sigma bonds are in the following compound?

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

Question 29

Each lone pair on the CH₃OH occupies a(n) ________ orbital.

A) s
B) p
C) sp
D) sp²
E) sp³

Question 30

Of the hydrogen halides, the strongest bond is found in ________ and the longest bond is found in ________.

A) HF; HF
B) HF; HI
C) HI; HF
D) HI; HI
E) HCl; HBr

Question 31

Are all the carbons in this structure in the same plane?

A) Yes
B) No

Question 32

How many sp² carbons are present in H₂C=C=CH₂

A) 0
B) 1
C) 1.5
D) 2
E) 3

Question 33

CH₃CN contains ________ sigma bonds and ________ pi bonds.

A) 5; 2
B) 4; 3
C) 4; 2
D) 2; 2
E) 4; 0

Question 34

What orbitals overlap to form the H-C bond in CH₃⁺?

A) sp³-sp³
B) sp²-sp³
C) s-p
D) s-sp²
E) s-sp³

Question 35

The nitrogen atom in (CH₃CH₂)₃N ________ is hybridized and the C-N-C bond angle is ________.

A) sp² ;>109.5°
B) sp² ;<109.5°
C) sp³ ;>109.5°
D) sp³ ;<109.5°
E) sp;109.5°

Question 36

How many carbon-carbon sigma bonds are in the following compound?

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

Question 37

Which of the following angles is closest to the C-O-C bond angle in CH₃-O-CH₃?

A) 180°
B) 120°
C) 109.5°
D) 90°
E) 160°

Question 38

What orbitals overlap to form the C-H bond in ethene (H₂C=CH₂)?

A) s-sp
B) s-sp²
C) s-sp³
D) s-p
E) p-p

Question 39

How many sp-hybridized atoms are in the following compound?

A) One
B) Two
C) Three
D) Four

Question 40

The lone-pair electrons of the methyl anion occupy a(n) ________ orbital.

A) s
B) p
C) sp
D) sp²
E) sp³

Question 41

Which of the following compounds does not have a dipole moment of zero?

A) CH₃NH₂
B) CO₂
C) CH₃OCH₃
D) $\left( \mathrm { CH } _ { 3 } \right) _ { 2 } \mathrm { C } = \mathrm { C } \left( \mathrm { CH } _ { 3 } \right) _ { 2 }$
E) CHCl₃

Question 42

Using the symbols δ+ and δ- , show the direction of the polarity in the O-H bond.

Question 43

Which bond in the following compound is the shortest?

A) bond 1
B) bond 2
C) bond 3
D) bond 4
E) bond 5

Question 44

What two factors determine the size of a bond's dipole moment?

Question 45

What is the H-C-H bond angle in H₂CO

A) 60°
B) 90°
C) 109.5°
D) 120°
E) 180°

Question 46

The carbon-carbon double bond in ethene is ________ and ________ than the carbon-carbon triple bond in ethyne.

A) stronger; shorter
B) stronger; longer
C) weaker; shorter
D) weaker; longer
E) stronger; more polar

Question 47

Convert the following Kekulé structure into a condensed structure.

Question 48

Which of the following compounds does not have a dipole moment of zero?

A) CO₂
B) CH_{4
C) CCl4
D) H2O
E) SO3}

Question 49

What is the $\mathrm { C } - \mathrm { N } - \mathrm { N }$ bond angle in the following compound?

A) ~60°
B) ~90°
C) ~110°
D) ~120°
E) ~ 180°

Question 50

What is the hybridization of the oxygen in CH₃OCH₃?

A) sp
B) sp²
C) sp³
D) sp⁴
E) sp⁵

Question 51

The hydrogen-halogen bond becomes ________ and ________ as the size of the halogen increases.

A) longer; weaker
B) longer; stronger
C) shorter; weaker
D) shorter; stronger

Question 52

What atomic property determines the polarity of a chemical bond?

Question 53

In which orbital are the lone-pair electrons of CH₃O^-.

A) s
B) p
C) sp
D) sp²
E) sp³

Question 54

What is the hybridization of the carbon H₂CO

A) sp
B) sp²
C) sp³
D) sp⁴
E) s³p

Question 55

Atoms with the same number of protons but different numbers of neutrons are called
________.

Question 56

What is the electronic configuration of Ca²⁺ ?

Question 57

Which of the following compounds has the smallest dipole moment?

A) Br₂
B) NH₃
C) HCl
D) HBr
E) HI

Question 58

Ar , and Cl- each have 18 electrons. What orbital does the highest-energy electron
occupy?

Question 59

Which of the following compounds has a dipole moment of zero?

A)
B)
C)
D)
E)

Question 60

Which of the following compounds has the weakest bond?

A) H₂
B) HF
C) HCl
D) HBr
E) HI

Question 61

Expand the condensed structure shown below to show the covalent bonds and the lone-pair electrons.

Question 62

What is the hybridization of the nitrogen in
(CH₃)₃N

Question 63

Draw the structure of a compound that contains only carbon and hydrogen atoms and that has two sp² carbons and one sp carbon.

Question 64

What is the hybridizations of the carbons, going from left to right, in

Question 65

Draw the Kekul structure o CH₂Cl₂ and show the direction of its dipole moment.

Question 66

What is the hybridization and bond angles of each carbon in CH₃CN

Question 67

Draw a 2p orbital.

Question 68

How many nonbonding electron pairs, bonding electron pairs, pi bonds, and sigma bonds are present CO₂?

Question 69

Draw the Lewis structure fo CH₃N₂⁺

Question 70

What is the hybridization and bond angles of the carbon ?

Question 71

Draw condensed structures for the four compounds with molecular formula C₃H₉N.

Question 72

Why is the horter and stronger than the bond in
ethane (

Question 73

Draw the Lewis structure of CH₂CO.

Question 74

What orbitals are used to form the covalent bonds in ?