Question :
11. What the energy of a photon of yellow light : 1335452
11. What is the energy of a photon of yellow light whose wavelength is 589 nm?
A)3.37 ? 10–19 JD)5.09 ? 105 J
B)3.37 ? 10–10 JE)3.38 ? 10–28 J
C)1.77 ? 102 J
12. A laser used in DVD players has a wavelength of 405 nm. What is the energy of this light in joules?
A)4.91 ? 10–28 JD)8.05 ? 10–23 J
B)4.91 ? 10–19 JE)2.98 ? 10–48 J
C)8.05 ? 10–32 J
13. The wavelength of the blue light given off by a mercury vapor street lamp is 436 nm.
What is the energy of this light in joules?
A)4.56 ? 10–28 JD)8.67 ? 10–23 J
B)4.56 ? 10–19 JE)9.63 ? 10–40 J
C)8.67 ? 10–32 J
14. A laser emits light with a frequency of 4.69 ? 1014 s–1. Calculate the wavelength of this light.
A)640 nmD)1.41 ? 1025 m
B)6.40 ? 10–9 mE)1.41 ? 1014 nm
C)1.56 ? 106 m
15. If the energy of a photon of light is 3.37 ? 10–19 J, what is the frequency of the light?
A)1.12 ? 10–27 s–1D)6.70 ? 10–44 s–1
B)8.90 ? 1026 s–1E)1.01 ? 10–10 s–1
C)5.09 ? 1014 s–1
16. Which of the following statements regarding spectra is incorrect?
A)Sunlight produces a continuous spectrum.
B)A heated ionic compound produces a line spectrum.
C)Several elements can produce the same line spectrum.
D)If you know the wavelength of a line in a spectrum, the energy of the light associated with that line can be calculated.
E)If you know the wavelength of a line in a spectrum, the frequency of the light associated with that line can be calculated.
17. Which of the following statements regarding the Bohr model of the hydrogen atom is incorrect?
A)Bohr’s model shows the electron circling the nucleus in fixed orbits.
B)In Bohr’s model, electrons could exist between orbits.
C)In Bohr’s model, when an electron absorbs energy, it can move to a higher-energy orbit.
D)In Bohr’s model, when an electron emits energy, it can move to a lower-energy orbit.
E)In Bohr’s model, n = 1 is the lowest energy orbit.
18. Which of the following statements regarding the Bohr model of the hydrogen atom is incorrect?
A)In Bohr’s model, when 1 electron moves directly from the n = 5 to the n = 3 orbit, two photons are emitted.
B)In Bohr’s model, when 1 electron moves from the n = 5 to the n = 4 orbit and then from the n = 4 to the n = 3 orbit, two photons are emitted.
C)In Bohr’s model, the transition of an electron from the n = 4 to the n = 3 orbit would result in the emission of a lower energy photon than a transition from the n = 3 to the n = 2 orbit.
D)In Bohr’s model, the transition of an electron from the n = 4 to the n = 3 orbit would result in the emission of a longer wavelength photon than a transition from the n = 3 to the n = 2 orbit.
E)In Bohr’s model, the four colored lines in the hydrogen spectrum result from transitions of electrons from higher energy levels down to the n = 2 orbit.
19. Rank the following electron transitions in a hydrogen atom from lowest energy to highest energy: n = 5 to n = 2, n = 4 to n = 2, n = 6 to n = 2, n = 3 to n = 2
A)n = 6 to n = 2 < n = 5 to n = 2 < n = 4 to n = 2 < n = 3 to n = 2
B)n = 3 to n = 2 < n = 4 to n = 2 < n = 5 to n = 2 < n = 6 to n = 2
C)n = 5 to n = 2 < n = 4 to n = 2 < n = 6 to n = 2 < n = 3 to n = 2
D)n = 5 to n = 2 < n = 6 to n = 2 < n = 4 to n = 2 < n = 3 to n = 2
E)n = 6 to n = 2 < n = 4 to n = 2 < n = 5 to n = 2 < n = 3 to n = 2
20. Rank the following electron transitions in a hydrogen atom from shortest wavelength to longest wavelength: n = 5 to n = 2, n = 4 to n = 2, n = 6 to n = 2, n = 3 to n = 2
A)n = 6 to n = 2 < n = 5 to n = 2 < n = 4 to n = 2 < n = 3 to n = 2
B)n = 3 to n = 2 < n = 4 to n = 2 < n = 5 to n = 2 < n = 6 to n = 2
C)n = 5 to n = 2 < n = 4 to n = 2 < n = 6 to n = 2 < n = 3 to n = 2
D)n = 5 to n = 2 < n = 6 to n = 2 < n = 4 to n = 2 < n = 3 to n = 2
E)n = 6 to n = 2 < n = 4 to n = 2 < n = 5 to n = 2 < n = 3 to n = 2
