Cheung, Anthony – Homework 2 – Due: Sep 19 2006, midnight – Inst: McCord
1
This
printout
should
have
30
questions.
Multiplechoice questions may continue on
the next column or page – find all choices
before answering.
The due time is Central
time.
Remember the first exam is on Wednesday,
9/20. CHECK the website to see which room
to go to. Some of you will take the exam in
HMA (Hogg Memorial Auditorium) and some
will take the exam in our classroom. CHECK
THE CLASS WEB SITE for this information.
You MUST go to the right room.
001
(part 1 of 1) 10 points
The work function for chrominum metal is
4.37 eV. What wavelength of radiation must
be used to eject electrons with a velocity of
9300 km
/
s? Answer in units of nm.
002
(part 1 of 1) 10 points
Calculate the wavelength of a motorcycle of
mass 275 kg traveling at a speed of 125 km/hr.
1.
1.93
×
10

38
m
2.
2.41
×
10

36
m
3.
1.93
×
10

41
m
4.
6.94
×
10

38
m
5.
2.08
×
10

29
m
003
(part 1 of 3) 10 points
Use the Rydberg formula for atomic hydrogen
to calculate the wavelength for the transition
from
n
= 4 to
n
= 2.
1.
205 nm
2.
8.63 nm
3.
486 nm
4.
2.45 nm
5.
94
.
9 nm
004
(part 2 of 3) 10 points
What is the name given to the spectroscope
series to which this transition belongs?
1.
Pfund series
2.
Balmer series
3.
Paschen series
4.
Brackett series
5.
Lyman series
005
(part 3 of 3) 10 points
In what region will the light lie?
1.
xray, gamma ray
2.
visible, blue
3.
visible, red
4.
visible, yellow
5.
infrared
6.
ultraviolet
006
(part 1 of 1) 10 points
The first line (lowest energy) in the Balmer
series appears at 15,233 cm

1
.
Where does
the second line appear?
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 Fall '07
 Fakhreddine/Lyon
 Chemistry, Atom, Atomic orbital, Hydrogen Spectral Series

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