Atomic and Molecular Physics
PHYS455+PHIS455
Mid-Term-1
First Semester (1436-1437)
College of Sciences -Al Zulfi
Duration: 9:00 – 10:00
Date: 5/1/1437
The student's name:
Physics Program
Number of pages: 4 with Cover
Section Group: 1069 + 1108
University ID:
Examination Guidelines
1-
Type your name and university identification number clearly in the space provided.
2-
Use blue or black pen in answer and pencil in drawing.
3-
Books or notes, papers and publications are not allowed into the examination room.
4-
Students are not allowed to get out from the examination room before passing 30
minutes from the beginning of test starting.
Learning Outcomes
The Knowledge Skills
a1
a2
Interpersonal skills and
taking responsibility
Cognitive skills
a3
b1
x
b2
b3
x
c1
x
c2
Communication,
information technology
and numerical skills
d1
d2
d3
x
Grades
Faculty member
…………………………….
Review Committee
Name
Signature
Corrector 1
/…………….
/…………….
/…………….
/…………….
/…………….
Final grade...…../….......
/…………….
1/4
Corrector 2
/…………….
/…………….
/…………….
Learning
outcome
Question
a3
1
a3
2
b2
3
/…………….
/…………….
/…………….
………………..
College of Sciences -Al Zulfi
Atomic and Molecular Physics
PHYS455+PHIS455
Mid-Term-1
First Semester (1436-1437)
Physics Program
[h=6.625x10-34J.s, c=3x108 m/s, o=8.85x10-12 C2/N. M2 , me=9.11x10-31 kg, e=1.6x10-19 C , R=1.097x107 m-1 ]
Question one:
1) Compare between the electron and photon?
Comparing
items
Electron
(5 marks)
Photon
mass
charge
wavelength
energy
velocity
2) Calculate the wavelength of an electron, which accelerated in a potential difference
150 V?
2/4
College of Sciences -Al Zulfi
Atomic and Molecular Physics
PHYS455+PHIS455
Mid-Term-1
First Semester (1436-1437)
Question two:
Physics Program
(7 marks)
Choose the correct answer:
1- In the positive ion
a) The atomic number is equal to the electron number
b) The neutron number is larger than the proton number
c) The electron number is smaller than the neutron number
d) The atomic number is larger than the electron number
2- In the Rutherford model the incident practical have
a) The same charge of the nuclear target
b) The same number of the target atom
c) The same number of the target electron
d) The same charge of the target electron
3- The energy levels of the H-atom according to the Bohr model is
a) Fixed with increasing the radius of the orbital level
b) Increasing with increase the radius of the orbital
c) Decreasing with increase the radius orbital
d) All the above answers
4- The velocity of the electron in the H-atom depended on
a) The distance between the nuclei and the electrons
b) The mass of the nucleus
c) The mass of the electron
d) All the above
5- The wave number increased as
a) The principle quantum number increased
b) The orbital quantum number decreased
c) The orbital quantum number increased
d) The principle quantum number decreased
6- The maximum wavelength in the Balmer series depended on
a) The energy difference between the third level and the first level
b) The energy difference between the second level and the first level
c) The energy difference between the continuum level and the second level
d) The energy difference between the third level and the second level
7- The minimum wavelength in the Balmer series depended on
a) The energy difference between the third level and the first level
b) The energy difference between the second level and the first level
c) The energy difference between the continuum level and the second level
d) The energy difference between the third level and the second level
3/4
College of Sciences -Al Zulfi
Atomic and Molecular Physics
PHYS455+PHIS455
Mid-Term-1
First Semester (1436-1437)
Question three:
1) In the Lyman series of the H - atom calculate:
a) The longest wavelength and the related frequency?
b) The shortest wavelength and the related frequency?
c) The ratio between the longest and shortest wavelength?
d) The ratio between the maximum and minimum frequency?
4/4
Physics Program
(6marks)