Transcript Chem 150 Unit 1

Question (Clicker)
Specify the number of electrons held in the energy levels 1-4
for an atom of neon (Ne).
1
A)
Level 1: 2
Level 2: 2
Level 3: 6
Level 4: 0
B)
Level 1: 1
Level 2: 2
Level 3: 4
Level 4: 3
C)
Level 1: 2
Level 2: 8
Level 3: 0
Level 4: 0
Question (Clicker)
Specify the number of electrons held in the energy levels 1-4
for and atom of sodium (Na).
2
A)
Level 1: 2
Level 2: 2
Level 3: 6
Level 4: 1
B)
Level 1: 2
Level 2: 8
Level 3: 1
Level 4: 0
C)
Level 1: 1
Level 2: 2
Level 3: 4
Level 4: 4
Question (Clicker)
Which of the following gives the correct total number of
electrons and the number of valence electrons for a
neutral Magnesium (Mg) atom?
3
A)
Total = 12, Valence = 2
B)
Total = 12, Valence = 12
C)
Total = 12, Valence = 10
D)
Total = 10, Valance = 2
Question (Clicker)
For magnesium, which energy level holds the valence
electrons?
4
A)
1
B)
2
C)
3
D)
4
Question (Clicker)
There is something special about having 8 valence electrons.
Elements that have 8 valence electrons are very stable and
unreactive. Which of the following elements has 8 valence
electrons?
5
A)
Neon (Ne)
B)
Fluorine (F)
C)
Oxygen (O)
D)
Sulfur (S)
Question (Clicker)
Which of the following is the correct formula for the ionic
compound that forms between sodium ions and oxide ions.
6
A)
NaO
B)
Na2O
C)
NaO2
D)
Na2O2
Question (Clicker)
Which of the following general statements are true about
metals and nonmetals approaches to adhering to the octet
rule.
7
A)
Metals look for ways to lose their valence electrons,
while nonmetals look for ways to gain additional
valence electrons.
B)
Both metals and nonmetals look for ways to lose
valence electrons.
C)
Both metals and nonmetals look for ways to gain
additional valence electrons.
D)
Metals look for ways to gain additional valence
electrons, while nonmetals look for ways to lose their
valence electrons.
Question
Name each of the following compounds:
8
A)
Li2O
B)
N2O
C)
MgCl2
D)
PbCl4
Question
Draw the electron dot, line-bond, condensed, and skeletal
structural formulas for 2-amino-propanoic acid (alanine):
H2N
H
O
C
C
CH3
9
OH
Question (Clicker)
Which answer correctly assigns the formal charges to the
labeled atoms in alanine:
A)
B)
C)
A 0, B 0, C 0, D 0
A 1+, B 1-, C 1-, D 1+
A 1-, B 0, C 1+, D 0
A
H
H
H
B
O
N
C
C
A 1+, B 0, C 1-, D 0
O
H
H
D)
C
C
D
H
H
The amino acid
alanine
10
Question
Identify the polar covalent bonds in the metabolite
glyceraldehyde-3-phosphate
O
H
C
H
C
O
H
O
H
C
H
O
P
O
H
11
O
H
Question (Clicker)
Which of the following molecules is polar?
A) F
C
C
H
B)
F
C
F
H
H
F
C
C)
C
F
H
F
F
C
F
12
F
F