Quiz1 E01-E03

Quiz1 E01-E03 - QUIZ 1 NAME (Last, First):...

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Unformatted text preview: QUIZ 1 NAME (Last, First): __________________________ Chemistry 6A Fall 2008 Section A/E___ Your UCSD PID: |A|__|__|__|__|__|__|__|__| signature: _____________________________ Total Points: _______ / 20 You have 10 minutes to complete this quiz. Please show all your work, but write the answers in the designated spaces. The points allotted for each question are indicated in parenthesis. 
 Potentially Helpful Constants: Potentially Helpful Equations: Mass
of
electron,
me
=
9.10938
x
10‐31
kg
 EK
=
1/2mv2
 Mass
of
proton,
mp
=
1.67262
x
10‐27
kg
 Mass
of
neutron,
mn
=
1.67493
x
10‐27
kg
 







 Fundamental
charge,
e
=
1.60218
x
10‐19
C
 
 g
=
9.80665
m•s‐2
 c
=
υ
λ
 c
=
2.99792
x
108
m•s‐1
 
 Potentially Helpful Conversion Factors: 1
J
=
1
N•m
 1
N
=
1
kg
m
s‐2
 1
L
=
103
cm3
 
 1. What
is
the
wavelength
in
meters
of
electromagnetic
radiation
with
a
 frequency
of
1.0
hertz?
(2
pt.)
 
 c
=
υ
λ
 Solve
for
λ:
c/
υ
=
(2.99792
x
108
m•s‐1)/
(1.0
Hz)
=
3.0
x
108
m
 2. Fill
in
the
black
with
one
of
the
8
main
group
or
the
element
name
(must
 be
written
out
fully;
not
just
the
symbol)
(3
pt)
 
 
 
 
 
 
 
 
 
 
 
 
 
 Ex:
Group
1:
The
Alkali
metals
 
 Ex.
elements:







 Lithium



and


Potassium
 
 Group
13/III:







Boron
























Group
 
 Ex.
Elements:

 
 Aluminum
and
Indium
 Group
14/IV:
The
Carbon
group
 
 
 Ex.
Elements:






Carbon












and







Silicon










.
 
 Others:
Germanium,
Tin,
and
Lead
 
 3. Which
type
of
light
is
higher
in
frequency
(4pt.)?
 i. X-rays | microwaves red light | blue light 
 4. For
each,
indicate
the
#
of
electrons
and
neutrons
present
in
each
 isotope
(4
pt)
 Protons
 
Electrons
 Neutrons
 Chlorine‐35
 



17
 
 






17
 





18
 
 
 7Li
 
 
 




3























3



















4
 
 5. List
two
of
the
four
points
given
by
John
Dalton’s
Atomic
Theory
for
the
 existence
of
atoms
(2
pt.)
 a. All
the
atoms
of
a
given
element
are
identical
 
 
 c. A
compound
is
a
specific
combination
of
atoms
of
more
than
one
 element
 
 
 
 
 d. In
a
chemical
reaction,
atoms
are
neither
created
nor
destroyed;
 they
exchange
partners
to
produce
new
substances
 b. The
atoms
of
different
elements
have
different
masses
 6. On
the
coordinate
below,
draw
a
wave
with
amplitude
6
cm
and
 wavelength
10
cm.
If
the
wave
is
traveling
at
10
m/s,
what
is
its
 frequency?
Label
all
x
 and
y
coordinates!
(5
 pt.)
 
 
 
 
 
 Frequency:___100
Hz______









 
 
 
 1
pt.
for
right
amplitude;
1
pt.
for
right
wavelength;
1
pt
for
a
wave
in
general;
 1
point
for
right
approach
to
solving
the
Frequency
if
the
answer
was
wrong;
 2
points
if
you
had
the
right
frequency.
 
 ‐ A
lot
of
people
got
the
value
for
the
frequency
answer
wrong,
but
some
 did
figure
it
out
.
Please
read
the
question
carefully
and
think
about
 the
problem
first,
instead
of
automatically
plugging
in
numbers
into
an
 equation
where
it
might
fit.

 
 ‐ The
question
is
asking
for
:
υ,
the
frequency
of
your
wave.

 ‐ You
are
given:
the
amplitude,
wavelength
and
speed
that
the
wave
is
 travelling.

 
 What
do
you
need
to
solve
the
probem?
 
 1) υ,
frequency,
is
defined
as
the
number
of
cycles
per
second;
one
cycle
is
 one

 2) This
wave
is
NOT
traveling
at
the
speed
of
light;
therefore
you
can’t
use
 the
equation
c
=
υ
λ,
where
c
is
the
speed
of
light.

 3) So
to
find
the
frequency,
use
the
definition:
 υ

 =
#
of
cycles
(wavelengths)/
second
 ‐ so
if
the
wave
is
travelling
at
10
m/s
(convert
to
cm

1000
cm/s)
,
and
 each
wavelength
is
10
cm,
for
every
second,
100
wavelengths
(cycles
)
 are
passing
 ‐ 
the
number
of
cycles/
second
(frequency)
=
100
Hz
 ...
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This note was uploaded on 12/07/2009 for the course CHEM CHEM 6A taught by Professor Czarkowski during the Fall '07 term at UCSD.

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