CHM 2210C Exam I Spring 2024 — 150 points Name:
KEY
Measurable Course Objectives Addressed in this Exam
halides, alkenes, alkynes, alcohols, ethers,
Recognize and identify the major organic function groups: alkanes, alkyl
ketones, aldehydes, carboxylic acids, esters, and amides.
groups: alkanes, alkyl halides, alkenes, alkynes,
Write names and structural formulas for the major organic functional
alcohols, ethers, ketones, aldehydes, and carboxylic acids.
Draw resonance structures and recognize the major resonance contributor.
credit. It is possible to achieve an exam grade
The total point value for this exam exceeds 150. The extra points are extra
of over 150 points.
correct answer.
Directions: For the following multiple choice questions, choose the most
1) (2.5 pts) Consider the species "*Zn, "*As, and Ge. These species have:
a. the same number of electrons
b. the same number of protons.
(c) the same number of neutrons.
d. the same number of protons and neutrons.
e. the same mass number.
2) (2.5 pts) Which atomic orbital is spherical in shape?
2s
b. 3p
c. 3d
d. 4f
e. They are all spherical.
3) (2.5 pts) The ground state electron configuration for arsenic is:
[Ar])4s*4p"
[Kr]4s%4p’
aooP
1s22s22p3s23p®3d124s24p!
. 1522s%2p®3s23pPas?3d¥4p’
1s22522p?3s23p®4s?3d'°4p*
4) (2.5 pts) How many p electrons are there in an atom of rubidium?
a. 12
@ 18
c. 24
d 9
e. 6
, 5) (2.5 pts) The species that contains 24 protons, 26 neutrons, and 22 electrons would be represented by the symbol:
a 50V3+
b. 26Cr2+
@ SOCr2+
d. “Mn?*
e. none of these
6) (2.5 pts) which of the following pairs of elements and valence electrons is incorrect?
a. Al3
b. Br,7
@ S, 4
d. Sr,
e. T3
7) (2.5 pts) Which is classified as nonpolar covalent?
(Electronegativity values: H=2.20,1=2.66, S =2.58, P =2.19, C1 = 3.16, N = 3.04)
a. The H-I bond in HI
b. The H-S bond in H,S
¢. The P-Cl bond in PCl;
The N-Cl bond in NCls
e. The N-H bond in NH3
8) (2.5 pts) The correct Lewis dot structure for hydrogen cyanide shows:
2 double bonds and two lone pairs of electrons on the N atom.
1 C-H bond, 1 C=N bond, 1 lone pair of electrons on the C atom and 1 lone pair of electrons on the N atom.
o
1 C-H bond, 1 C-N bond, 2 lone pairs of electrons on the C atom and 3 lone pairs of electrons on the N atom.
po
1 triple bond between C and N, 1 N-H bond and 2 lone pan's of electrons on the C atom.
Q 1 tripe bond between C and N, 1 C-H bond and 1 lone pair of electrons on the N atom.
9) (2.5 pts) What is the total number of valence electrons in the correct Lewis dot structure for the sulfite ion?
10) (2.5 pts) The electronic structure of the SO molecule is best represented as a resonance hybrid of
equivalent structures.
(a) 2
3
. 4
d. 5
e. This molecule does not exhibit resonance.
KEY
Measurable Course Objectives Addressed in this Exam
halides, alkenes, alkynes, alcohols, ethers,
Recognize and identify the major organic function groups: alkanes, alkyl
ketones, aldehydes, carboxylic acids, esters, and amides.
groups: alkanes, alkyl halides, alkenes, alkynes,
Write names and structural formulas for the major organic functional
alcohols, ethers, ketones, aldehydes, and carboxylic acids.
Draw resonance structures and recognize the major resonance contributor.
credit. It is possible to achieve an exam grade
The total point value for this exam exceeds 150. The extra points are extra
of over 150 points.
correct answer.
Directions: For the following multiple choice questions, choose the most
1) (2.5 pts) Consider the species "*Zn, "*As, and Ge. These species have:
a. the same number of electrons
b. the same number of protons.
(c) the same number of neutrons.
d. the same number of protons and neutrons.
e. the same mass number.
2) (2.5 pts) Which atomic orbital is spherical in shape?
2s
b. 3p
c. 3d
d. 4f
e. They are all spherical.
3) (2.5 pts) The ground state electron configuration for arsenic is:
[Ar])4s*4p"
[Kr]4s%4p’
aooP
1s22s22p3s23p®3d124s24p!
. 1522s%2p®3s23pPas?3d¥4p’
1s22522p?3s23p®4s?3d'°4p*
4) (2.5 pts) How many p electrons are there in an atom of rubidium?
a. 12
@ 18
c. 24
d 9
e. 6
, 5) (2.5 pts) The species that contains 24 protons, 26 neutrons, and 22 electrons would be represented by the symbol:
a 50V3+
b. 26Cr2+
@ SOCr2+
d. “Mn?*
e. none of these
6) (2.5 pts) which of the following pairs of elements and valence electrons is incorrect?
a. Al3
b. Br,7
@ S, 4
d. Sr,
e. T3
7) (2.5 pts) Which is classified as nonpolar covalent?
(Electronegativity values: H=2.20,1=2.66, S =2.58, P =2.19, C1 = 3.16, N = 3.04)
a. The H-I bond in HI
b. The H-S bond in H,S
¢. The P-Cl bond in PCl;
The N-Cl bond in NCls
e. The N-H bond in NH3
8) (2.5 pts) The correct Lewis dot structure for hydrogen cyanide shows:
2 double bonds and two lone pairs of electrons on the N atom.
1 C-H bond, 1 C=N bond, 1 lone pair of electrons on the C atom and 1 lone pair of electrons on the N atom.
o
1 C-H bond, 1 C-N bond, 2 lone pairs of electrons on the C atom and 3 lone pairs of electrons on the N atom.
po
1 triple bond between C and N, 1 N-H bond and 2 lone pan's of electrons on the C atom.
Q 1 tripe bond between C and N, 1 C-H bond and 1 lone pair of electrons on the N atom.
9) (2.5 pts) What is the total number of valence electrons in the correct Lewis dot structure for the sulfite ion?
10) (2.5 pts) The electronic structure of the SO molecule is best represented as a resonance hybrid of
equivalent structures.
(a) 2
3
. 4
d. 5
e. This molecule does not exhibit resonance.
