Test bank for Organic Chemistry 6Th Edition By Smith
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Grado
Chemistry - Test Bank
Institución
Chemistry - Test Bank
Organic Chemistry, 6e (Smith) Chapter 1 Structure and Bonding
1) What is the ground-state electronic configuration of a carbon atom? A) 1s2, 2s2, 2p5
B) 1s2, 2s2, 2p2 C) 1s2, 2s2, 2p6 D) 1s2, 2s2, 2p4
Answer: B
Difficulty: 1 Easy
Section: 01.01
Topic: Structure and Bonding Bloom's: 2. Underst...
1. Give the ground-state electron configuration for carbon (atomic number 6).
ANS:
1s22s22px12py1 or 1s22s22p2
2. Give the ground-state electron configuration for fluorine (atomic number 9).
ANS:
1s22s22px2 2py2 2pz1 or 1s22s22p5
3.Give the ground-state electron configuration for magnesium (atomic number 12).
ANS:
1s22s22p63s2
4. How many electrons does silicon have in its valence shell?
ANS:
four
Exhibit 1-1
Write valid Lewis (electron-dot) structures for each formula below. Show all electrons as dots and show
all non-bonding electrons.
5. C2Cl4 tetrachloroethylene
ANS:
6. CO2 carbon dioxide
ANS:
7. CH4O methanol
1
,Structure and Bonding
ANS:
Exhibit 1-2
Consider the structure of urea, shown below, to answer the following question(s).
8. Refer to Exhibit 1-2. Fill in any non-bonding valence electrons that are missing from the line-bond
structure.
ANS:
9. Refer to Exhibit 1-2. The carbon atom in urea is:
sp3 hybridized
sp2 hybridized
sp hybridized
not hybridized
ANS:
b
10. Refer to Exhibit 1-2. The predicted NH2C=O bond angle in urea is:
109.5
120
180
not predictable
ANS:
b
2
, Chapter 1
Exhibit 1-3
Determine the hybridization for the indicated atoms in each structure below.
11. Refer to Exhibit 1-3. The hybridization of this oxygen atom (A) is ______.
ANS:
sp2
12. Refer to Exhibit 1-3. The hybridization of this oxygen atom (B) is ______.
ANS:
sp3
13. Refer to Exhibit 1-3. The hybridization of this carbon atom (C) is ______.
ANS:
sp3
14. Refer to Exhibit 1-3. The hybridization of this carbon atom (D) is ______.
ANS:
sp
15. The molecular formula C2H4O can be converted into three-line bond (Kekulé) structures that are
consistent with valence rules.
Which one of the Kekulé structures is not consistent with valence rules?
Explain why the structure you chose in part a is not consistent with valence rules.
ANS:
d
The carbon bonded to the oxygen atom in structure d is pentavalent; it has 10 valence
electrons. Carbon can only have eight valence electrons. In addition, the other carbon
has only six valence electrons when it would prefer to have eight.
3
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