I
'Name:
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Class:
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Date: ---------
Electron Configurations: Equations will be listed on the front board.
Matching
Match each item with the correct statement below.
a. atomic orbital
d~-" ground state ~ Pauli exclusion principle ,___b. aufbau principle
c. electron configuration
-f.-· -Heisenberg uncertainty principle
1. region of high probability of finding an electron
2.
3.
4.
5.
6.
states the impossibility of knowing both velocity and position of a moving particle at the same time
lowest energy level
tendency of electrons to enter orbitals of lowest energy first
arrangement of electrons around atomic nucleus
each orbital has at most two electrons
Match each item with the correct statement below.
a. atomic emission spectrum
d. photon
b. frequency
e. quantum
c. wavelength
f. visible spectrum
7.
8.
9.
10. 11. 12. discrete bundle of electromagnetic energy released
energy needed to move an electron from one energy level to another
number of wave cycles passing a point per unit of time
distance between wave crests
separation of light into its different wavelengths
frequencies of light emitted by an element
Multiple Choice
Identify the letter of the choice that best completes the statement or answers the question.
13. The principal quantum number indicates what property of an electron?
c. energy level
a. position
b. speed
d. electron cloud shape
14. What is the shape of the 3p atomic orbital?
c. bar
a. sphere
d. two perpendicular dumbbells
b. dumbbell
15. (XC) How many energy sublevels are in the second principal energy level? L
1
~
3
b. 2
d. 4
16. What is the maximum number of/orbitals in any single energy level in an atom?
a. 1
c. 5
b. 3
~ 7
17. What is the maximum number of d orbitals in a principal energy level? L
1
~
3
b. 2
d. 5
1
ID: A
Name: ______________________
ID: A
18. What is the maximum number of orbitals in the p sublevel?
a. 2
c. 4
b. 3
19. d.
5
(xq What is the Ill4ximum number of electrons in the second principal energy level?
a. 2
b. 8
c.
d.
18
32
20. The letter "p" in the symbol 4p 3 indicates the __.
a. spin of an electron
c. principle energy level
d. speed of an electron
b. orbital shape
21. If the spin of one electron in an orbital is clockwise, what is the spin of the other electron in that orbital?
a. zero
c. counterclockwise
d. both clockwise and counterclockwise
b. clockwise
22. What types of atomic orbitals are in the third principal energy level?
a. sand p only
c. s, p, and d only
d. s, p, d, and f
b. p and d only
23. What is the next atomic orbital in the series Is, 2s, 2p, 3s, 3p?
L
U
~
~
b. 3d
d. 4s
24. What is the number of electrons in the outermost energy level of an oxygen atom?(At. #
a.
~
2
4
c.
d
=8)
6
8
25. What is the electron configuration of potassium?(At. # =19)
a. lS22s22p23s23p24s1
c. lS22s 23s 23p 6 3d 1
b. ls22s 22plo3s 23p 3
d.
lS22s22p63s23p64s1
26. If three electrons are available to fill three empty 2p atomic orbitals, how will the electrons be distributed in
the three orbitals?
a. one electron in each orbital
b. two electrons in one orbital, one in another, none in the third
c. three in one orbital, none in the other two
d. Three electrons cannot fill three empty 2p atomic orbitals.
27. (xq How many half-filled orbitals are in a bromine atom?(At. # =35)
L
1
~
3
b. 2
d. 4
28. What is the basis for exceptions to the aufbau diagram?
a. Filled and half-filled energy sublevels are more stable than partially-filled energy sublevels. b. Electron configurations are only probable.
c. Electron spins are more important than energy levels in determining electron configuration. d. Some elements have unusual atomic orbitals.
29. Which of the following electron configurations of outer sublevels is the most stable?
a. 4d 5 SS 1
c.
2
4d 3 SS 3
Name: ID: A
30. How does the speed of visible light compare with the speed of gamma rays, when both speeds are measured
in a vacuum?
a. The speed of visible light is greater.
b. The speed of gamma rays is greater.
c. The speeds are the same.
d. No answer can be determined from the information given.
31. Which color of visible light has the shortest wavelength?
a. yellow
c. blue
b. green
d. violet
32. Which type of electromagnetic radiation includes the wavelength lo-7m?
a. gamma ray
c. radio wave
d. visible light
b. microwave
33. How are the frequency and wavelength of light related?
a. They are inversely proportional to each other.
b. Frequency equals wavelength divided by the speed of light.
c. Wavelength is determined by dividing frequency by the speed of light.
d. They are directly proportional to each other.
34. (XC) The light given off by an electric discharge through sodium vapor is __.
a. a continuous spectrum
c. of a single wavelength
b. an line spectrum
d. white light
35. Emission of light from an atom occurs when an electron __.
a. drops from a higher to a lower energy level
b. jumps from a lower to a higher energy level
c. moves within its atomic orbital
d. falls into the nucleus
36. What is the approximate energy of a photon having a frequency of 4 x 107 Hz? (h =6.6 x 1q-34 J~)
a. 3 x 10-26 J
c. 2 X 10-41 J
b. 3 X 10-27 J
d. 3 X 1042 J
37. What is the approximate frequency of a photon having an energy 5 x 10-24 J? (h
a. 8 x 109 Hz
c. 3 X 10-58 Hz
d. 1 X 10-10 Hz
b. 3 X 10-57 Hz
38. Which variable is directly proportional to frequency?
c. position
a. wavelength
d. energy
b. velocity
39. What are quanta of light called?
c. muons
a. charms
b. excitons
d. photons
40. Which scientist developed the quantum mechanical model of the atom?
c. Niels Bohr
a. Albert Einstein
b. Erwin Schrodinger
d. Ernest Rutherford
41. The quantum mechanical model of the atom __.
a. defines the exact path of an electron around the nucleus
b. was proposed by Niels Bohr
c. involves the probability of finding an electron in a certain position
d. has many analogies in the visible world
3
=6.6 x 10-34 J~)
Name: ID: A
Ct;'xh~ cruli+}
42. (XC) Who predicted that all matter can behave as waves as well as particles?
a. Albert Einstein
c. Max Planck
d. Louis de Broglie
b. Erwin Schrodinger
43. According to the Heisenberg uncertainty principle, if the position of a moving particle is known, what other
quantity CANNOT be known?
a. mass
c. spin
b. charge
d. velocity
Short Answer Directions: Show all and Choose 1 of 44/45, Choose 1 of 46/47, Choose 1 of 48/49
. 44. Give the electron configuration for a neutral atom of beryllium. Include the Lewis Dot Structure for
beryllium.
45.
Give the electron configuration for a neutral atom of chlorine. Include the Lewis Dot Structure for chlorine.
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46. What is the frequency of ultraviolet light with wavelength 2.94 x 10-8 m? (c =3.00 X 108 m/s)
47. What is the wavelength of gamma ray electromagnetic radiation with a frequency of 2.73 x 10 20 Hz? (c =
3.00 X 10 8 m/s)
.J 48.
~J:. L....
I
What is the frequency of a radar photon with energy 6.80 x 10-25 J? (h
=6.63 x 10-34 J1;)
49. What is the energy of a microwave photon that has a frequency of 1.12 x 1012 Hz? (h = 6.63 x 10-34 J1;)
Essay
50.
lr"" 51.
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6pts. Describe the different principles that govern the building of an electron configuration.
Explain what is meant by the Heisenberg uncertainty principle.
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