Gauthier, Joseph – Homework 3 – Due: Sep 18 2007, midnight – Inst: Vandenbout
1
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printout
should
have
25
questions.
Multiplechoice questions may continue on
the next column or page – find all choices
before answering.
The due time is Central
time.
This homework is the second of two home
works from Chapter 12 in your textbook.
001
(part 1 of 1) 10 points
What is the de Broglie wavelength of a flea
midway through its jump? Assume the mass
of the flea is 4
.
50
×
10

4
g and it is moving at
1.00 m/s.
1.
1
.
47244
×
10

27
m
correct
2.
2
.
9818
×
10

37
m
3.
2
.
9818
×
10

40
m
4.
1
.
4725
×
10

30
m
Explanation:
m
= 0
.
00045 g
×
0
.
001 kg
1 g
= 4
.
5
×
10

7
kg
λ
=
h
p
=
h
m
·
v
=
6
.
626
×
10

34
kg
·
m
2
s
(4
.
5
×
10

7
kg)(1 m
/
s)
= 1
.
47244
×
10

27
m
002
(part 1 of 1) 10 points
An electron in a 3
d
orbital could have which
of the following quantum numbers?
1.
n
= 3;
‘
= 0;
m
‘
= 0
2.
n
= 3;
‘
= 1;
m
‘
=

1
3.
n
= 3;
‘
= 1;
m
‘
= 2
4.
n
= 3;
‘
= 3;
m
‘
= 1
5.
n
= 3;
‘
= 2;
m
‘
= 0
correct
6.
n
= 2;
‘
= 2;
m
‘
= 6
7.
n
= 3;
‘
= 2;
m
‘
=

3
Explanation:
3 refers to the principal quantum number
n
.
d
corresponds to the subsidiary quantum
number
‘
= 2.
Since
‘
= 2,
m
‘
could be

2
,

1
,
0
,
1 or 2.
003
(part 1 of 1) 10 points
How many
p
electrons does Se (atomic num
ber 34) possess?
1.
16
correct
2.
0
3.
6
4.
34
5.
10
6.
12
7.
4
Explanation:
Se has 6 electrons in the 2
p
and 3
p
orbitals
plus 4 more in the 4
p
orbital. This gives it a
total of 16
p
electrons.
004
(part 1 of 3) 10 points
What is the principal quantum number for
the orbital 5
f
?
1.
5
correct
2.
2
3.
6
4.
4
5.
None of these
6.
3
Explanation:
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Gauthier, Joseph – Homework 3 – Due: Sep 18 2007, midnight – Inst: Vandenbout
2
n
= 5
005
(part 2 of 3) 10 points
What is the orbital angular momentum quan
tum number for the orbital 5
f
?
1.
1
2.
3
correct
3.
None of these
4.
2
5.
4
6.
0
Explanation:
‘
= 3
006
(part 3 of 3) 10 points
How many magnetic quantum numbers does
the orbital 5
f
have?
1.
None of these
2.
3
3.
9
4.
5
5.
7
correct
6.
1
Explanation:
m
‘
=

3
,

2
,

1
,
0
,
1
,
2
,
3
007
(part 1 of 1) 10 points
How many total nodal planes are present in
the complete set of 3
d
orbitals?
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