This document contains 19 multiple choice questions about fundamental concepts in chemistry including: electron configurations, isoelectronic species, orbital shapes, ion charges, bond polarity, conjugate bases, ionic compounds, condensed structural formulas, carbon skeleton diagrams, constitutional isomers, formal charges on atoms in Lewis structures. The questions assess understanding of how atomic and molecular structure determines chemical properties.

1. Chapter 1 Structure Determines
Properties-Dr. Rob Craig, Ph.D

2. • 1. What is the ground state electron
configuration of carbon?
•
•
•
•
•
A.
B.
C.
D.
1s22s22px1
1s22s22px2
1s22s22px12py1
1s22s22px22py1

3. 2.
Which of the following has(have) the same
electron configuration as Ne?
Na- Mg2+ O2- Mg+
•
•
•
•
A.
B.
C.
D.
Na- and O2Mg2+ and O2Mg+ and O2only Mg2+

4. 3.
What is the letter designation given to dumbbell
shaped orbitals like the one depicted below?
•
•
•
•
A.
B.
C.
D.
s
p
d
f

5. • 4. What is the charge on the phosphorus ion
in Na3P?
•
•
•
•
•
A.
B.
C.
D.
-3
-1
+1
+3

6. • 5. Predict which bond is the most polar in
ethanol, CH3CH2OH?
•
•
•
•
A.
B.
C.
D.
C—C
C—H
C—O
O—H

7. • 6. Which one of the following is the
conjugate base of NH3?
•
•
•
•
A.
B.
C.
D.
NH4+
H+
N3NH2–

8. 7. Which one of the following is the ionic
compound formed between magnesium and
chlorine?
•
•
•
•
A.
B.
C.
D.
MgCl
MgCl2
Mg2Cl3
MgCl3

9. 8.
Identify the condensed formula of the following
structure:
•
•
•
•
•
A.
B.
C.
D.
(CH3)2CHCHClCH(CH3)2
CH3CH(CH3)CHClCH(CH3)2
(CH3)2CHCHClC(CH3)3
(CH3)3CCHClCH(CH3)2

10. 9.
What is the chemical formula of the following
carbon skeleton diagram?
•
•
•
•
A.
B.
C.
D.
C8H14
C8H16
C8H18
C8H20

11. 10. How many hydrogen atoms are there on
carbon atoms 1 and 2, respectively, in the structure
below?
•
•
•
•
A.
B.
C.
D.
4, 1
4, 0
3, 1
3, 0

12. 11. How many C3H8O constitutional isomers
are possible?
•
•
•
•
A.
B.
C.
D.
one
two
three
four

13. 12. Which of the following best describes the
relationship between the following two structures?
•
•
•
•
A.
B.
C.
D.
identical compounds
resonance structures
constitutional isomers
different compounds with different constitutions

14. 13. How many constitutional isomers of
C4H9Br are possible?
•
•
•
•
A.
B.
C.
D.
one
two
three
four

15. 14. How many constitutional isomers of
C3H6Cl2 are possible?
•
•
•
•
A.
B.
C.
D.
three
four
five
six

16. 15. What is the formal charge on the carbon
atom?
•
•
•
•
A.
B.
C.
D.
+1
0
-1
-2

17. • 16. Which of the following describes the relationship
between the following two structures?
•
•
•
•
A.
B.
C.
D.
identical structures
resonance forms
constitutional isomers
different compounds with different compositions

18. • 17. Which of the following describes the relationship
between the following two structures?
•
•
•
•
A.
B.
C.
D.
identical structures
resonance forms
constitutional isomers
different compounds with different compositions

19. • 18. What is the formal charge on the oxygen
atom in the structure below?
•
•
•
•
A.
B.
C.
D.
-1
0
+1
+2

20. • 19. What is the formal charge on the nitrogen
atom in the structure below?
•
•
•
•
A.
B.
C.
D.
-1
0
+1
+2