1. Ch4: Electrons Light Quantum Model Lab Electron Config. Potpourri 100
Final
Light
Quantum Model
Lab
Electron Config.
Potpourri
100
200
300
400
500 1 2 3 4

2. 100 Light Name three wave properties of light
100 Light Name three wave properties of light. Light behaves as a wave when it _______. Answer

3. Refraction, diffraction, interference
Light 100
Refraction, diffraction, interference
Light behaves as a wave when it propagates (travels).

4. 200 Light When an electron in an atom falls from the 5th to the 2nd energy level, 4.58 x 1019 J of energy are released. What is the frequency of this energy? Answer
All Play!

5. Light 200
E = h
4.58 x 1019 J = x 1034Jsec X
Answer = 6.91 x 1014 Hz

6. 300 Light A bright line in the spectrum of sodium has a wavelength of x 10-7m. What is the frequency? Answer
All Play!!

7. Light 300 Answer X= 5.08 x 1014Hz Use c = 
3.00 x 108m/sec = 5.90 x 10-7 m X
Answer X= 5.08 x 1014Hz

8. 400 Light Explain the photoelectric effect
400 Light Explain the photoelectric effect. Is this a wave or particle property? Answer

9. Light 400
Light of certain frequencies striking a metal causes the metal to release electrons. (electric current is created)
This is a particle property.

10. 500 Light The visible spectrum has wavelengths from 400 to 700 nm. 1
500 Light The visible spectrum has wavelengths from 400 to 700 nm. 1. Convert each of these values to meters. 2. What type of light would have a wavelength of 7.5 x 10-7 meters? Answer

11. Light 500 ?m = 700nm X 1 meter = 7 x 10-7 meters
1 x 109 nm
?m = 700nm X 1 meter = 7 x 10-7 meters
7.5 x 10-7 meters is longer wavelength than visible light, thus it is Infrared

12. 100 Quantum Model Name the scientist who stated that electrons occupy orbitals of equal energy singly, with parallel spins, before doubling up Answer
All Play

13. Quantum Model 100
Hund

14. 200 Quantum Model A 3-dimensional region about the nucleus where an electron may be found is a(n) Answer
All Play!!!!

15. Quantum Model 200
orbital

16. 300 Quantum Model Name the 1st quantum number, describe what it indicates and what its possible values are. Answer

17. A photon of yellow light has 3.58 x 10-19 Joules of energy.
Final Jeopardy
A photon of yellow light has
3.58 x Joules of energy.
What is the wavelength of this light in nanometers?
Answer

18. Final Jeopardy Answer  = 5.55 x 10-7 m = 555 nm E 3.58 x 10-19 Joules
E = hc/ 
 = hc = x Jsec x 3.00 x 108 m/s
E x Joules
 = 5.55 x 10-7 m = 555 nm

19. Principle Quantum Number
Quantum Model 300
Principle Quantum Number
Indicates energy level of electron – distance from nucleus
Values are positive integers 1, 2, 3, etc.

20. 400 Quantum Model 1. The valence configuration of an element is: 5s24d105p3. In what period is this element? 2. The valence configuration of an element is 7s2. In what group is this element? Answer
All Play!!

21. Quantum Model 400
1. 5s24d105p3 -- this element is in Period 5 because the energy level of its s and p electrons is 5.
2. 7s2 -- this element is in Group 2 because it has 2 valence electrons in the s-sublevel

22. 500 Quantum Model Give the letters naming the 4 types of sublevels (shapes) and indicate the maximum # of electrons each can hold Answer

23. Quantum Model 500
s= 2
p= 6
d = 10
f = 14

24. 100 Lab
An illuminated tungsten light bulb, a hot toaster coil, and molten lava are all examples of: Answer
All Play!!

25. Lab 100
Incandescence

26. 200 Lab Explain the difference between phosphorescence and fluorescence. Give one example of each Answer

27. Lab 200
Both are the absorption of energy(usually UV) with the emission of visible light.
In fluorescence the object stops glowing as soon as the energy source is removed.
In phosphorescence, the glowing persists for a time after the energy source is removed.
An example of phosphorescence is: a glow-in-the-dark toothbrush.
An example of fluorescence is: the bright white glow of dirty shoelaces under a UV light.

28. 300 Lab A flame test is performed on a metal compound
300 Lab A flame test is performed on a metal compound. The flame is a hot pink color. What metal must be present? (Give name and symbol) Answer

29. Lab 300
Li Lithium

30. 400 Lab What piece of lab equipment is needed to view a spectrum
400 Lab What piece of lab equipment is needed to view a spectrum? What in this room emits a bright line spectrum? Answer

31. Lab 400
A spectroscope
The fluorescent lights or a flame test.

32. 500 Lab Explain why the beads changed color
500 Lab Explain why the beads changed color. Explain why the UV lamps made the beads change color, but the red laser did not. Answer

33. Lab 500
A reversible chemical reaction occurred. The product of the reaction was colored.
A minimum amount of energy was necessary to cause the chemical reaction.
UV radiation has more energy than red frequencies.
Red light does not carry that minimum amount of energy.

34. 100 Electron Configuration Identify each of the following atoms based on their electron configurations. A. [Ne]3s2 B. [Ar]3d64s2 C. [Xe]6s24f145d Answer
All Play!!

35. Electron Configuration 100
Mg – magnesium
Fe – iron
Ir -- iridium

36. 200 Electron Configuration Write the orbital diagram for phosphorus
200 Electron Configuration Write the orbital diagram for phosphorus Answer

37. Electron Config 200 Answer
        
1s 2s 2px py pz 3s 3px py pz

38. 300 Electron Configuration Write the noble gas configuration for Re, Rhenium Answer

39. Electron Configuration 300
Re [Xe]6s24f145d5

40. 400 Electron Configuration Give the electron configuration, noble gas configuration and dot diagram for strontium Answer

41. Electron Configuration 400
1s22s22p63s23p64s23d104p65s2
[Kr]5s2
Sr:

42. 500 Electron Configuration Palladium is one of the elements whose electrons shift to create a more stable configuration than conventional configurations predict. Write the noble gas configuration for palladium Answer

43. Electron Configuration 500
Predicted configuration:
[Kr]5s24d8
Actual configuration:
[Kr]5s04d10

44. 100 Potpourri Which of the following configurations is impossible according to the Quantum Model? A. 1s22s23p1 B. 1s22s22p62d1 C. [Rn]7s26d1 D. [Xe]6s25d Answer
All Play!

45. Potpourri 100
B. Is impossible because there is no d sublevel allowed in the 2nd energy level.

46. 200 Potpourri Determine the % by mass of nitrogen in TNT
200 Potpourri Determine the % by mass of nitrogen in TNT. The formula of TNT is C7H5N3O Answer

47. Answers for Potpourri 200 % N in C7H5N3O6
% N = x 3 x 100 = 18.50%
g/mol

48. 300 Potpourri Give the dot symbols for each of the following elements: Be Si As S

49. 400 Potpourri 1. For the following elements, state how many valence electrons each has. A. Li B. S C. I 2. State how many electrons each must gain or lose to become stable. 3. In what ratio do you expect Li and S to react? Answer

50. Li and S react in a 2:1 Ratio
Potpourri 400
Element
# Valence
Gain/lose
# electrons Li 1
Lose S 6
Gain 2 I 7
Li and S react in a 2:1 Ratio
Li2S

51. 500 Potpourri
A sample has the composition of 85.5% C and 14.5% H. It has a molar mass of 98. What is the molecular formula of this compound? (hint: find empirical formula 1st!) Answer
All Play!!

52. Potpourri 500 mol C = 85.5 g x 1 mol = 7.12 mol C/7.12 = 1 12.01g
mol H = 14.5 g x 1 mol = mol H/7.12 = 2.02
1.01 g
Empirical = C1H2
molar mass of empirical = 14.03
98/14.03 = Molecular formula = C7H14