Name: _____________________
Period: ___
Properties of Light and Quantum Mechanics
(1) Microwave radiation has a wavelength of 1.0 cm.
Determine the frequency and energy of this form of radiation.
(2) The first radio station in Los Angeles broadcasted with a frequency of 930 kHz.
Determine the wavelength and energy of
this form of radiation.
(3) Blue light emits photons with an energy of 4.41x10
19
J.
Determine the frequency and wavelength of this light.
(4) It requires 7.29x10
19
J of light energy to remove an electron from the surface of tungsten metal.
Determine the frequency
and wavelength of photons with this energy.
(5) Calculate the energy of an electron in the first energy level of a hydrogen atom. Calculate the energy of an electron in the
second energy level of a hydrogen atom.
How much energy is given off by an electronic transition from the second level to
the first energy level?
What is the wavelength and frequency associated with this energy?
(6) Calculate the energy of an electron in the third energy level of a hydrogen atom. Calculate the energy of an electron in
the fifth energy level of a hydrogen atom.
How much energy is given off by an electronic transition from the fifth level to the
third energy level?
What is the wavelength and frequency associated with this energy?
(7) Label the orbital described by each set of quantum numbers.
(a) n = 3 and l = 1
(c) n = 5 and l = 3
(b) n = 2 and l = 0
(d) n = 4 and l = 2
(8) Which sets of quantum numbers are not allowed in a hydrogen atom?
For the sets of quantum numbers that are incorrect,
state what is wrong.
(a) n = 2, l = 2, m
l
= 1, m
s
= ½
(c) n = 5, l = 1, m
l
= 2, m
s
= ½
(b) n = 3, l = 1, m
l
= 0, m
s
= ½
(d) n = 2, l = 0, m
l
= 0, m
s
= ½
(9) How many orbitals can have each designation?
(a) 2p
(b) 3d
(c) 4p
x
(d) n = 3
(e) n = 4
(10) How many electrons can have each designation?
(a) 1s
(b) 2p
(c) 3p
y
(d) 2d
xy
(e) 5f
(11) What is the maximum number of electrons in an atom that can have the given quantum numbers?
(a) n = 4
(c) n = 3 and m
l
= 0
(b) n = 5 and l = 2
(d) n = 3 and m
s
=
½
(12) Give the orbital notation for each atom/ion.
(a) Ge
(b) Cs
(c) Zr
(d) Cl

(e) Sr
2+
(f) Zn
2+
(13) Give the electron configuration notation for each atom/ion.
(a) K
(b) Ni
(c) Pu
(d) Mg
2+
(e) Br

(f) Ag
+
(14) Give the noble gas notation for each atom/ion.
(a) Si
(b) Y
(c) Ba
(d) Ca
2+
(e) Au
3+
(f) Mo
2+
(15) Give the ground state and two possible excited states for oxygen.
(16) An excited state for different atoms is given. Identify the element and give the ground state configuration.
(a) 1s
2
2s
2
2p
5
3s
1
(b) 1s
2
2s
2
2p
6
3s
2
3p
6
4s
2
3d
5
4p
1
(c) [Kr] 5s
2
4d
7
5p
2
6s
1
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View Full DocumentAnswers:
(1)
ν
= 3.0x10
10
Hz, E = 2.0x10
23
J
(2)
λ
= 323 m, E = 6.2x10
28
J
(3)
ν
=6.66 x10
14
Hz ,
λ
= 4.51x10
7
m
(4)
ν
= 1.10x10
15
Hz,
λ
= 2.73x10
7
m
(5) E
2
= 5.445x10
19
J, E
2
= 2.178x10
18
J, E
21
= 1.6345x10
18
J,
ν
= 2.465x10
15
Hz,
λ
= 1.22x10
7
m
(6) E
5
= 8.712x10
20
J, E
3
= 2.420x10
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 Spring '10
 Bohr
 Atom, Chemical bond, Intermolecular force, chloroethane

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