Multiple Choice Questions
Atomic Structure (I):
   
1. Photons of gamma radiation: 

have very low energy 
have very high energy 
have energy that can be either high or low depending on the intensity of the radiation. 
have a deep blue color 
move at speeds much greater than the speed of visible light.
2. Calculate the frequency (n) of the gamma radiation in Hertz (i.e., s-1). {l = 1.00 x 10-10 meters.}

3.00 x 1018
6.63 x 10-44
3.00 x 108
6.63 x 10-24
3.33 x 10-19

Questions 3 through 5 are based on the following electronic energy level diagram of the hydrogen atom.
Undisplayed Graphic
3. Photons associated with the shortest wavelength would be emitted from the atom by the transition labeled: 

ABCDE
4. The arrow representing the ionization potential is:

ABCDE
5. The energy (in Joules) associated with the transition labeled by arrow B is: 

2.18 x 10-18 absorbed 
1.06 x 10-19 absorbed 
1.06 x 10-19 emitted 
1.82 x 10-19 emitted 
1.82 x 10-19 absorbed 
6.  The first ionization potential of the sodium atom is represented by which of the following expressions? 

Na+ (g) + e- (g) = Na (g) 
Na (g) = Na+ (g) + e- (g) 
Na- (g) = Na (g) + e- (g) 
Na+ (g) = Na2+ (g) + e- (g) 
Na2 (g) = 2Na (g)
Questions 7 through 11 are based on the following elements:

Li (Z = 3)   F (Z = 9)   Ne (Z = 10)   K (Z = 19)    Br (Z = 35).
7. The element with the highest first ionization potential is: 

LiFNeKBr
8. The most metallic of the above elements is: 

LiFNeKBr 
9. The oxide of this element would have the most basic properties when dissolved in water. 

LiFNeKBr
10. The species that is isoelectronic with Mg2+ is: 

LiFNeKBr 
11.  The element having atoms with the largest atomic radius is: 

LiFNeKBr
Questions 12 through 16 are based on the following ground state electron configuration of an element X.

1s2 2s2 2p6 3s2 3p4
12. The element X is a: 

metalnon-metalmetalloidtransition metalnoble gas
13. Element X, when combined with sodium (Z = 11) would produce a compound with the formula:

NaX 
NaX2
Na2X3
Na3X2
Na2X
14. The number of unpaired electrons in element X is: 

1234none
15. Element X would be found in Periodic Group:

IIAIIIAIVAVAVIA
16. The valence electron configuration of element X is:

1s2 2s2 2p6 3s2 3p4
3s2
3s2 3p4
3p4
2p6 3s2 3p4
17. The ground state electronic configuration of the zinc ion, Zn2+ (Z = 30) is: 

1s2 2s2 2p6 3s2 3p6 3d10
1s2 2s2 2p6 3s2 3p6 4s2 3d8
1s2 2s2 2p6 3s2 3p6 4s2 3d10
1s2 2s2 2p6 3s2 3p6 4s2 3d12
1s2 2s2 2p6 3s2 3p6 3d8
18. Elements in periodic groups IIA and VIA usually react with each other to form compounds that are: 

covalentionicmetallicnon-metallicinsoluble in water 
19. One of the transitions occurring in sodium vapor lamps that produces the yellow color involves photons having an energy equal to 203 kJ per mole of photons. What is the wavelength(l) associated with these photons in meters?

9.80 x 10-28
1.02 x 10-7
1.70 x 106
5.90 x 10-7
203 
20. X-Rays are characterized as having ________wavelengths and _____ energy.

long, lowlong, highshort, lowshort, highmedium, medium
21. A local radio station broadcasts at a frequency of 88.5 MHz. Calculate the wavelength, in meters, of this radiation. 

0.2953.396.8683.20.885
22. Calculate the energy, in KJ, for a mole of photons having a frequency of 88.5 MHz. 

5.86x10-32
5.86x10-26
3.53x10-2
3.53x10-5
5.86x10-29
23. The wavelength of electromagnetic radiation is:

directly proportional to its energy. 
directly proportional to its frequency. 
directly proportional to absolute temperature. 
inversely proportional to its energy. 
inversely proportional to its speed.
24. Quantum theory, as applied to atoms, tells us that:

electrons behave as particles. 
electrons misbehave. 
electrons in atoms may have only certain specified energy states. 
electrons may have any energy. 
light behaves as a wave.
25. Two electrons may not occupy the same atomic orbital unless they have different:

shapesizeenergyspincolor
26. When an electron in a hydrogen atom undergoes a transition from the n = 6 state to the n = 3 state:

a photon is emitted and a line appears in the emission spectrum. 
a photon is emitted and a line appears in the absorption spectrum. 
a photon is absorbed and a line appears in the emission spectrum. 
a photon is absorbed and a line appears in the absorption spectrum. 
the atom is ionized.
27. The ionization potential of hydrogen is 1312 kJ/mole. The energy of the n = 1 state of hydrogen, in kJ/mol, is:

1312-13120infinityinsufficient information given 
28. DeBroglie postulated that:

light had particle properties 
light had wave properties 
matter had particle properties 
matter had wave particles 
E = hu
29. The ground state electronic configuration of 22Ti is:

1s22s22p63s23p64s24p2
1s22s22p63s23p63d4
1s22s22p63s23p64s23d2
1s22s22p62d103s2
1s21p62s22p63s23p4
30. The ground state electronic configuration of 8O- is: 

1s22s22p5
1s22s22p4
1s22s22p3
1s22s22p6
1s21p62s1
31.  The ground state valence electronic configuration of 24Cr+ is: 

3d44s2
3d44s1
3d54s1
3d5
3d4
32. A neutral element has the ground state electronic configuration of 1s22s22p63s23p63d104s24p65s24d7. This element would be classified as a(an): 

inert (noble) gas 
halogen 
representative element 
inner transition element 
transition element 
33. The element in problem 13 would have _____ unpaired electrons.

02357
Questions 34 through 38 should be answered using a  periodic table.
34. The most metallic element is:

FrLiHFHe
35. The element with the smallest first ionization potential is:

FrLiHFNe
36. The most electronegative element is: 

FrLiHFHe
37. The alkali metal that reacts most vigorously with water is:

HLiBeCaCs 
38.  The halogen that reacts most vigorously with hydrogen is:

F2
Cl2
Br2
I2
O2
Consider the isoelectronic series 8O2-9F-10Ne 11Na+12Mg2+ to answer questions 39and 40.
39. It would be most difficult to remove an electron from:

O2-
F-
Ne 
Na+
Mg2+
40. The species with the largest radius is:

O2-
F-
Ne 
Na+
Mg2+
41. The valence electron configuration of the element with the following ground state electronic configuration, 1s2 2s2 2p6 3s2 3p5, is:

1s2 2s2 2p6 3s2 3p5
3s2
3s2 3p5
3p5
2p6 3s2 3p5
42.  How many lone pairs of electrons on the nitrogen atom in the NH3 molecule?

1234none
43. One of the transitions occurring in sodium vapor lamps that produces the yellow color involves photons having an energy equal to 203 kJ per mole of photons. What is the frequency(u) associated with these photons in Hz?

2.00 x 10-15
5.09 x 1011
5.09 x 1014
2.00 x 10-12
203
44. A line in the emission spectrum of Li has a wavelength of 671 nm. What is the energy, in kJ, of a mole of photons of this wavelength?

2.96x10-19
178 
1.44x10-12
262 
1.78x105
45. An element has the valence electron configuration of ns2np4. This element would be found in periodic group: 

IVAIVBVIAVIBVIIIA
46. The valence electron configuration of O- is:

2s22s3
2s22p4
2s22p5
2s22p6
3p5
Questions 47 through 50 are based on the atoms: Li, Cs, Si, F, I
47. The most metallic element is:

LiCsSiFI
48. The element with the largest first ionization potential is: 

LiCsSiFI
49. The most electronegative element is:

LiCsSiFI 
50. The element with the largest radius is:

LiCsSiFI
51. A radio station broadcasts at a frequency of 840 kHz. What is the wavelength in meters of this broadcast?

0.2802.522803573.57 x 105
52. The lowest frequency light that will produce photoelectrons in platinum is 1.3 x 1015 Hz. What is the energy of this radiation in kJ/mol?

8.62 x 10-19
1.54 x 10-11
143 
519 
834
53. A photon of violet radiation (l = 434 nm) would have a ________ energy and a ________ frequency compared to a photon of red radiation (l= 650 nm).

higher, higher 
lower, lower 
higher, lower 
lower, higher 
equal, equal 
54. Atomic emission line spectra are evidence that: 

electrons in atoms move in circular orbits about the nucleus 
beams of subatomic particles have wave properties. 
there are only certain sets of values of allowed energies for atoms. 
longer wavelength electromagnetic radiation has lower frequencies. 
Chem 111 students are ready for summer.
55. If the electron in a hydrogen atom were in the energy level with n = 3, how much energy in J would be required to ionize the atom?

2.18 x 10-18
6.54 x 10-18
1.43 x 10-19
2.42 x 10-19
3.14 x 10-20
56. The ground state electronic configuration of Cr (Z = 24) is:

1s2 2s2 2p6 3s2 3p6 3d6
1s2 2s2 2p6 3s2 3p6 4s2 4p4
1s2 2s2 2p6 3s2 3p6 4s1 4p5
1s2 2s2 2p6 3s2 3p64s1 3d5
1s2 2s2 2p6 3s2 3p6 4s2 3d4
57. The ground state electronic configuration of the positive ion Fe3+ (Z = 26) is:

1s2 2s2 2p6 3s2 3p6 4s2 3d9
1s2 2s2 2p6 3s2 3p6 4s1 3d10
1s2 2s2 2p6 3s2 3p6 4s2 3d3
1s2 2s2 2p6 3s2 3p6 4s1 3d4
1s2 2s2 2p6 3s2 3p6 3d5
58. Of the following third period elements
Mg, Al,  Si,  S,  Ar
the ones that are diamagnetic in the ground state are:

Si and SAl, Si and SMg and ArMg, Si, S and Arthey all are
59. A neutral Se atom (Z = 34) has ___ valence electrons.

46141634 
60. An element M with the valence electron configuration ns2 forms a compound with an element X with the valence electron configuration ns2np4. The formula of the compound which is formed would be expected to be:

M2X 
MX 
MX2
M3X2
M2X3