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Chemistry
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Chemistry
Quiz 4: Atoms and Light
Path 4
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Question 61
Essay
Show the path of an electron on an atom as it absorbs energy going from energy level 1 to level 6 and then releasing energy (as a photon) to fall to energy level 3. Be sure to show the relative differences in energy of the levels.
Question 62
Short Answer
The photoelectric effect experiment is performed on strontium metal. When light with ? = 389 nm shines on the metal, electrons are ejected at a velocity of 3.97 x 10
5
m/s. What is the threshold frequency,
ν
\nu
ν
o
, for strontium metal?
Question 63
Short Answer
What is the wavelength of electrons moving at 1.5 x10
6
m/s (about 0.5% the speed of light)?
Question 64
Short Answer
What is the kinetic energy in kJ/mole of electrons with a wavelength of 0.22 nm (the distance between some atoms)?
Question 65
Short Answer
What is the wavelength of electrons with kinetic energy 95 kJ/mole?
Question 66
Short Answer
At what velocity would an electron need to travel at to have a wavelength of 0.1 nm?
Question 67
Short Answer
An electron has velocity of 3 x 10
2
m s
-1
; determine the wavelength and frequency of this electron.
Question 68
Short Answer
One wavelength of infrared radiation absorbed by water is 3150 nm. At what velocity will electrons have this wavelength?
Question 69
Short Answer
List the possible values of m
l
for an electron in a 3p subshell.
Question 70
Short Answer
List the possible values for l for an electron in the 4
th
principle quantum level.
Question 71
Short Answer
List all possible quantum sets for an electron in the 4p quantum level.
Question 72
Short Answer
Atomic orbitals on different atoms can interact with each other, with different results. For now, consider two atoms, A and X. Draw contour pictures of the interaction of the 2s orbital on A with the 2p orbital on X, with the preferred axis of the p orbital (one of the lobes) pointing at the s orbital.
Question 73
Short Answer
Atomic orbitals on different atoms can interact with each other, with different results. For now, consider two atoms, A and X. Draw contour pictures of the 2p orbital on A and the 2p orbital on X where the preferred axes are parallel (a side-by-side interaction).
Question 74
Short Answer
Which of the following pictures shows the appropriate number of nodes for a 3d orbital?
Question 75
Short Answer
Which of the following is a view of the d
xy
orbital from the z axis?
Question 76
Essay
Please define what a node is and how many would be found in a 4p orbital.
Question 77
Short Answer
The energy required to convert O
2
molecules to O atoms is 496 kJ/mole. If electromagnetic radiation of 180 nm is absorbed by 1 mole of O
2
molecules, how much kinetic energy will be present in the O atoms?
Question 78
Essay
Draw a molecular picture illustrating the decomposition of O
3
to O
2
+ O in the stratosphere.
Question 79
Short Answer
The bond energy for molecular oxygen, O
2
, is 495 kJ/mol; the maximum wavelength of light capable of fragmenting the ozone molecule is 340 nm. What is the difference between the bond energies of O
2
and O
3?