1) Post a comment saying that you've started working on the homework due Friday
2) Answer the following questions for "Atomic Theory Phys Sci" documents. Each one of you should post your answer to the problem assigned to you. This way I know what time you reached that question :P
Aman - 19
Riya - 13
Divya - 14
Deshal - 18
1) An incandescent gas emits only certain colors. What happens if we change the temperature of the gas? (p. 210)
2) In your own words, what does "intensity" (of light) mean? (p. 210)
3) Explain this sentence, "...an accelerating electron should emit an electromagnetic wave such as light, which would move off into space from the electron." (p. 212)
4) Bohr "postulated this rule as a way to make his theory consistent with other scientific theories." What is "this rule" and what are the "other scientific theories"? (p. 212)
5) Why are the orbits called "radiationless" (p. 212)
6) What is a quantum leap? (p. 212)
7) Explain why an electron jumping from a high energy state to a low energy state emits higher frequency light than an electron which jumps from a medium energy state to a low energy state. (p. 212) 9898001471 sunil duvai
8) Think of gravitational potential energy. Objects held above the surface of the earth have a certain amount of potential energy. The further we move the object away from the earth, the higher the potential energy of the object. Is this situation analogous to the potential energy of an electron in an atom? Why or why not? Explain in detail. (p. 212)
9) Would it take more work to remove an electron from the n=3 orbit (i.e. pull the electron all the way out of the atom) or from the n=5 orbit? (p. 212)
10) Could an electron in a hydrogen atom have -1.82 eV of energy? (p. 212)
11) Is the energy of light proportional or inversely proportional to the frequency of the light? Give the equation relating energy to frequency. (p. 213)
12) If a container of mercury atoms are exposed to a potential, what type of light do they emit? (p. 213)
13) Suppose I had a container of hydrogen gas and I only wanted it to emit red light. Suggest some possible ways of achieving this. (p. 212)
14) Now suppose I wanted the hydrogen gas to emit yellow light. Is this possible? If so, how could I accomplish this? (p. 212)
15) What type of light does hydrogen emit if n=8? (p. 211)
16) What does the "single quantum number" of Bohr's model refer to? (p. 213)
17) What does de Broglie mean by "symmetry found in nature"? (p. 214)
18) Suppose that the circumference of a particular orbit is 3x10^-10 m. Give three possible wavelengths for standing electron waves that could fit in the orbit. (p. 214)
19) Since all matter has a wavelength associated with it, which particle traveling at the speed of light has a larger wavelength - an electron or a photon? HINT: look at de Broglie's equation (8.5) to see the relationship between mass and wavelength and then think about which is heavier, electron on photon.
3) Do the following MCQs at the end of the 4th Atomic Theory doc
Aman - 4, 8, 12, 16, 20, 24, 28
Riya - 1, 5, 9, 13, 17, 21, 25, 29
Divya - 2, 6, 10, 14, 18, 22, 26, 30
Deshal - 3, 7, 11, 15, 19, 23, 27, 31
2) Answer the following questions for "Atomic Theory Phys Sci" documents. Each one of you should post your answer to the problem assigned to you. This way I know what time you reached that question :P
Aman - 19
Riya - 13
Divya - 14
Deshal - 18
1) An incandescent gas emits only certain colors. What happens if we change the temperature of the gas? (p. 210)
2) In your own words, what does "intensity" (of light) mean? (p. 210)
3) Explain this sentence, "...an accelerating electron should emit an electromagnetic wave such as light, which would move off into space from the electron." (p. 212)
4) Bohr "postulated this rule as a way to make his theory consistent with other scientific theories." What is "this rule" and what are the "other scientific theories"? (p. 212)
5) Why are the orbits called "radiationless" (p. 212)
6) What is a quantum leap? (p. 212)
7) Explain why an electron jumping from a high energy state to a low energy state emits higher frequency light than an electron which jumps from a medium energy state to a low energy state. (p. 212) 9898001471 sunil duvai
8) Think of gravitational potential energy. Objects held above the surface of the earth have a certain amount of potential energy. The further we move the object away from the earth, the higher the potential energy of the object. Is this situation analogous to the potential energy of an electron in an atom? Why or why not? Explain in detail. (p. 212)
9) Would it take more work to remove an electron from the n=3 orbit (i.e. pull the electron all the way out of the atom) or from the n=5 orbit? (p. 212)
10) Could an electron in a hydrogen atom have -1.82 eV of energy? (p. 212)
11) Is the energy of light proportional or inversely proportional to the frequency of the light? Give the equation relating energy to frequency. (p. 213)
12) If a container of mercury atoms are exposed to a potential, what type of light do they emit? (p. 213)
13) Suppose I had a container of hydrogen gas and I only wanted it to emit red light. Suggest some possible ways of achieving this. (p. 212)
14) Now suppose I wanted the hydrogen gas to emit yellow light. Is this possible? If so, how could I accomplish this? (p. 212)
15) What type of light does hydrogen emit if n=8? (p. 211)
16) What does the "single quantum number" of Bohr's model refer to? (p. 213)
17) What does de Broglie mean by "symmetry found in nature"? (p. 214)
18) Suppose that the circumference of a particular orbit is 3x10^-10 m. Give three possible wavelengths for standing electron waves that could fit in the orbit. (p. 214)
19) Since all matter has a wavelength associated with it, which particle traveling at the speed of light has a larger wavelength - an electron or a photon? HINT: look at de Broglie's equation (8.5) to see the relationship between mass and wavelength and then think about which is heavier, electron on photon.
3) Do the following MCQs at the end of the 4th Atomic Theory doc
Aman - 4, 8, 12, 16, 20, 24, 28
Riya - 1, 5, 9, 13, 17, 21, 25, 29
Divya - 2, 6, 10, 14, 18, 22, 26, 30
Deshal - 3, 7, 11, 15, 19, 23, 27, 31
starting now
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