Download Quiz 7

Chem 1151
Spring 2007
Name________KEY______________
h = 6.626E-34 J s
hc/λ = ΔE = - 2.18E-18 (1/nf2 – 1/ni2) J
Quiz 7A
15 points, 15 min.
Lab Sec_______
c = 3.00E+8 m/s
λ = h/(mv)
1.
(3) The wavelength of light associated with a frequency of 2.00E+9 Hz is
A.
6.0E+17 m
B.
6.67 m
**C. 0.15 m
λ = c/ν = 3E+8/2.00E+9 = 0.15 m
D.
5.0E-10 m
E.
2.00E+9 m
2.
(6)
A.
B.
C.
D.
E.
F.
Select the correct answer or fill in the blank
It takes [more, the same, less] energy to remove an electron from the n = 4
level of hydrogen than from the n = 2 level (ionization process).
The energy needed to remove an electron from the ground state of
hydrogen is ___2.18E-18____Joules. (write down the value)
The Heisenberg’s Uncertainty Principle is the mathematical expression of
the “duality of nature”. This state is [true, false]
The electron in the ground state of Li2+ is held [more tightly, less tightly,
the same as] the electron in the ground state of H.
The ground state of hydrogen has quantum number is [0, 1, ∞]
The photoelectric effect demonstrated that electrons are
[waves, particles, neither]
3.
(3) The mass of a proton is @2000 times that of an electron. If both subatomic
particles have the same velocity, calculate the ratio of their deBroglie
wavelengths, λp/λe
**A. 5E-4 λ is indirectly proportional to mass so λp/λe = me/mp = 0.0005
B.
44.72
C.
not enough information
D.
4E+6
E.
2000
4.
(3)
**A.
B.
C.
D.
E.
Which hydrogen atom transition emits the largest amount of energy?
ni = 4  nf = 1
ni = 1  nf = 4
ni = 4  nf = 3
ni = 6  nf = 4
ni = 1  nf = 2
Chem 1151
Spring 2007
Name________KEY________________
h = 6.626E-34 J s
hc/λ = ΔE = - 2.18E-18 (1/nf2 – 1/ni2) J
Quiz 7B
15 points, 15 min.
Lab Sec_______
c = 3.00E+8 m/s
λ = h/(mv)
1.
(3) The frequency of light associated with a wavelength of 0.0043 m is
A.
1.43E-11 Hz
B.
0.0043 Hz
C.
1.3E+6 Hz
D.
2.16E+22 Hz
**E. 7.00E+10 Hz ν = c/λ = 3E+8/0.0043m = 7E10 Hz
2.
(6)
A.
B.
C.
D.
E.
F.
Select the correct answer or fill in the blank
The ground state of hydrogen has quantum number is [0, 1, ∞]
The photoelectric effect demonstrated that electrons are
[waves, particles, neither]
It takes [more, the same, less] energy to remove an electron from the n = 4
level of hydrogen than from the n = 7 level (ionization process).
The electron in the ground state of H is held [more tightly, less tightly, the
same as] the electron in the ground state of Li2+.
The Heisenberg’s Uncertainty Principle is the mathematical expression of
the “duality of nature”. This state is [true, false]
The energy needed to remove an electron from the ground state of
hydrogen is ___2.18E-18_______Joules. (write down the value)
3.
(3) The mass of a neutron is @2000 times that of an electron. If both subatomic
particles have the same velocity, calculate the ratio of their deBroglie
wavelengths, λe/λn
A.
5E-4
**B. 2000 λ is indirectly proportional to mass so λe/λn = mn/me = 2000
C.
not enough information
D.
4E+6
E.
44.72
4.
(3)
A.
**B.
C.
D.
E.
Which hydrogen atom transition emits the largest amount of energy?
ni = 1  nf = 4
ni = 4  nf = 1
ni = 4  nf = 3
ni = 6  nf = 4
ni = 1  nf = 2