Practice4ans

Practice4ans - Practice Questions (with answers) Quiz #4...

Info iconThis preview shows pages 1–6. Sign up to view the full content.

View Full Document Right Arrow Icon
Practice Questions (with answers) Quiz #4 material 1. a. 1 = metal surface, 2 = vacuum, 3 = ejected electron, 4 = incident light b. 1 = incident light, 2 = ejected electron, 3 = vacuum, 4 = metal surface c. 1 = incident light, 2 = ejected proton, 3 = vacuum, 4 = metal surface c. 1 = incident light, 2 = ejected electron, 3 = hydrogen gas, 4 = metal surface e. 1 = incident light, 2 = ejected proton, 3 = hydrogen gas, 4 = metal surface 2. The wavelength distribution of the light emitted from a blackbody depends on the: a. material of the blackbody b. color of the blackbody c. temperature of the blackbody d. a and c e. a, b, and c 1. 2. 3. 4.
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
3. In Bohr’s atomic theory, when an electron moves from one energy level to another energy level more distant from the nucleus, a. no change in energy occurs b. light is emitted c. energy is absorbed d. energy is emitted e. None of the above 4. Which observation most clearly supports the conclusion that electrons in atoms have quantized energies? a. Diffraction b. Blackbody radiation c. The ultraviolet catastrophe d. The scattering of alpha particles by metal foil e. The emission spectrum of hydrogen 5. The yellow color in fireworks is caused by the 589 nm emission of sodium atoms. What energy light is this? a. 3.37 x 10 -28 J b. 3.37 x 10 -37 J c. 3.37 J d. 3.37 x 10 -19 J e. None of the above
Background image of page 2
6. What is the energy of the wave shown below? a. 1.33 x 10 -34 J b. 6.00 x 10 7 J c. 3.31 x 10 -33 J d. 3.97 x 10 -26 J e. None of the above 7. Barium salts give a green color in fireworks. If the energy of light emitted is 3.7129 x 10 -19 J, what is the wavelength of the emitted light? a. 535 nm b. 5.35 x 10 -7 nm c. 1.87 x 10 8 nm d. 505 nm e. None of the above 1 sec
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
8. Calculate the energy required to excite the hydrogen electron from level n = 1 to level n = 4. a. 2.042 x 10 -18 J b. -2.314 x 10 -18 J c. -2.042 x 10 -18 J d. 2.314 x 10 -18 J e. None of the above 9. The following sentense is a description of what effect? The classical theory of matter, which assumes that matter can absorb or emit any quantity of energy, predicts a radiation profile that has no maximum and goes to infinite intensity at very short wavelengths. a. The strange emission spectra of hydrogen b. Diffraction c. The photoelectric effect d. The ultraviolet catastrophe e. None of the above 10. The patterns that are a result of the diffraction of light can only be described in terms of: a. particles b. waves c. particles and waves d. energy e. None of the above
Background image of page 4
11. What’s wrong with the Bohr model? a. When applied to atoms other than hydrogen, it does not predict what is seen experimentally b. Electrons do not move around the nucleus in circular orbits as it says they do c. It does not predict the energy level values obtained from the hydrogen emission spectrum d. a and b e. All of the above 12. The photoelectric effect showed that: a. light displayed particle-like behavior b. the wavelength distribution depends only on the temperature c. the longer the wavelength of light the higher the energy of that light
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 6
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 18

Practice4ans - Practice Questions (with answers) Quiz #4...

This preview shows document pages 1 - 6. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online