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Organic Chemistry, 9e (Wade)
Chapter 1 Structure and Bonding
1) While you were up late one night studying organic chemistry, you happened to see the last 5
minutes of an infomercial on TV. The spokesperson claimed that their brand of automobile tires
were superior to all other brands on the market because they were made by using only natural
rubber, isolated from the resin of rubber trees. How could a chemist test her claims that no
petroleum products went into the manufacture of her brand of tires?
Answer: Compounds synthesized from petroleum products have a lower content of Plantderived compounds are recently synthesized from CO2 in the air and have a higher content.
Diff: 2
Section: 1.1
GO: G5
2) The atomic number of boron is 5. The correct electronic configuration of boron is:
A) 1s22s3
B) 1s22p3
C) 1s22s22p1
D) 2s22p3
E) 1s22s23s1
Answer: C
Diff: 1
Section: 1.2
LO: 1.1
3) How many distinct p orbitals exist in the second electron shell, where n = 2?
A) 2
B) 3
C) 4
D) 5
E) 6
Answer: B
Diff: 1
Section: 1.2
4) The __ tells us that each orbital can hold a maximum of 2 electrons.
A) aufbau principle
B) Pauli exclusion principle
C) Hund’s rule principle
D) LeChatelier principle
E) uncertainty principle
Answer: B
Diff: 1
Section: 1.2
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5) A node is a region of high electron density between the two atoms in a covalent bond.
Answer: FALSE
Diff: 1
Section: 1.2
6) When filling two or more orbitals of the same energy with electrons, the electrons will go into
different orbitals rather than pair up in the same orbital.
Answer: TRUE
Diff: 1
Section: 1.2
7) Atoms with the same number of protons but different numbers of neutrons are called
.
Answer: isotopes
Diff: 1
Section: 1.2
GO: G2
8) The electron density of orbitals has spherical symmetry.
Answer: s
Diff: 1
Section: 1.2
9) The formal charge on the nitrogen on the structure shown below is:
Answer: N = +1
Diff: 1
Section: 1.7
LO: 1.3
GO: G2
MCAT LO: MCAT1.2
10) An oxygen atom has __ valence electrons.
Answer: 6
Diff: 1
Section: 1.2
LO: 1.1
11) Which element in the second row of the periodic table has six valence electrons and a
valence of two?
Answer: oxygen
Diff: 1
Section: 1.2
LO: 1.1
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12) Orbitals which are equal in energy are referred to as .
A) degenerate
B) polar
C) nodes
D) filled
E) nonpolar
Answer: A
Diff: 2
Section: 1.2
13) In a carbon atom, the 2s and 2p orbitals are the same energy.
Answer: FALSE
Diff: 2
Section: 1.2
LO: 1.1
14) The element with the electronic configuration 1s22s22p63s1 is .
Answer: sodium
Diff: 2
Section: 1.2
LO: 1.1
15) Provide the electron configuration of phosphorus.
Answer: 1s22s22p63s23p3
Diff: 2
Section: 1.2
LO: 1.1
16) Draw the shape of a 2p orbital, including shading to indicate phase.
Answer:
Diff: 2
Section: 1.2
17) Draw a correct Lewis structure for chloromethane, CH3Cl, including all non-bonding lone
pairs.
Answer:
Diff: 1
Section: 1.4
LO: 1.3
MCAT LO: MCAT1.2
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18) Provide a Lewis structure for a molecule with molecular formula CH2O2.
Answer:
Diff: 2
Section: 1.4
LO: 1.2
GO: G2
MCAT LO: MCAT11.2
19) Draw the Lewis structure for 2-propanol, CH3CH(OH)CH3, including all non-bonding lone
pairs.
Answer:
Diff: 2
Section: 1.4
LO: 1.3
MCAT LO: MCAT1.2
20) Draw the Lewis structure of acetic acid, CH3CO2H, including all non-bonding lone pairs.
Answer:
Diff: 2
Section: 1.4
LO: 1.3
MCAT LO: MCAT1.2