Question :
21. The red line observed in the line spectrum for : 1335453
21. The red line observed in the line spectrum for hydrogen has a wavelength of 656 nm. What is the frequency of this light in hertz (s–1)?
A)4.57 ? 105 s–1D)2.18 ? 10–13 s–1
B)4.57 ? 1014 s–1E)1.97 ? 102 s–1
C)2.18 ? 10-6 s–1
22. The green line observed in the line spectrum for hydrogen has a wavelength of 486 nm. What is the frequency of this light in hertz (s–1)?
A)1.46 ? 102 s–1D)1.62 ? 10–6 s–1
B)6.17 ? 105 s–1E)1.62 ? 10-13 s–1
C)6.17 ? 1014 s–1
23. The red line observed in the line spectrum for hydrogen has a wavelength of 656 nm. What is the energy of a photon of this light?
A)3.03 ? 10–28 JD)3.30 ? 1018 J
B)3.03 ? 10–19 JE)1.30 ? 10–22 J
C)3.30 ? 1027 J
24. The green line observed in the line spectrum for hydrogen has a wavelength of 486 nm. What is the energy of a photon of this light?
A)9.66 ? 10–23 JD)2.44 ? 1018 J
B)4.09 ? 10–28 JE)2.44 ? 1027 J
C)4.09 ? 10–19 J
25. Upon electrification, hydrogen produces a characteristic line spectrum consisting of four lines in the visible region of the electromagnetic spectrum. The light emitted in different regions of the visible spectrum corresponds to transitions from the third (n = 3), fourth (n = 4), fifth (n = 5), or sixth (n = 6) energy level down to the second (n = 2). Which transition corresponds to the red line in the hydrogen spectrum?
A)n = 2 ? n = 3D)n = 4 ? n = 2
B)n = 2 ? n = 6E)n = 6 ? n = 2
C)n = 3 ? n = 2
26. Upon electrification, hydrogen produces a characteristic line spectrum consisting of four lines in the visible region of the electromagnetic spectrum. The light emitted in different regions of the visible spectrum corresponds to transitions from the third (n = 3), fourth (n = 4), fifth (n = 5), or sixth (n = 6) energy level down to the second (n = 2). Which transition corresponds to the violet line in the hydrogen spectrum?
A)n = 2 ? n = 3D)n = 4 ? n = 2
B)n = 2 ? n = 6E)n = 6 ? n = 2
C)n = 3 ? n = 2
27. Upon electrification, hydrogen produces the following line spectrum in the visible region of the electromagnetic spectrum. If the light emitted corresponds to transitions from the third (n = 3), fourth (n = 4), fifth (n = 5), or sixth (n = 6) energy level down to the second (n = 2), which transition corresponds to the emission of light with lowest frequency?
ColorWavelength (?), nm
Violet410
Indigo434
Blue-green486
Red656
A)n = 2 ? n = 3D)n = 4 ? n = 2
B)n = 2 ? n = 6E)n = 6 ? n = 2
C)n = 3 ? n = 2
28. Upon electrification, hydrogen produces the following line spectrum in the visible region of the electromagnetic spectrum. If the light emitted corresponds to transitions from the third (n = 3), fourth (n = 4), fifth (n = 5), or sixth (n = 6) energy level down to the second (n = 2), which transition corresponds to the emission of light with highest frequency?
ColorWavelength (?), nm
Violet410
Indigo434
Blue-green486
Red656
A)n = 2 ? n = 3D)n = 4 ? n = 2
B)n = 2 ? n = 6E)n = 6 ? n = 2
C)n = 3 ? n = 2
29. Upon electrification, hydrogen produces the following line spectrum in the visible region of the electromagnetic spectrum. If the light emitted corresponds to transitions from the third (n = 3), fourth (n = 4), fifth (n = 5), or sixth (n = 6) energy level down to the second (n = 2), which transition corresponds to the emission of light with highest energy?
ColorWavelength (?), nm
Violet410
Indigo434
Blue-green486
Red656
A)n = 2 ? n = 3D)n = 4 ? n = 2
B)n = 2 ? n = 6E)n = 6 ? n = 2
C)n = 3 ? n = 2
30. Which of the following statements regarding orbitals is correct?
A)There is no difference between the orbitals of the modern model of the atom and the orbits of the Bohr model of the atom.
B)A 1s orbital can be represented as a two-dimensional circle centered around the nucleus of an atom.
C)A 2p orbital is smaller than a 3p orbital.
D)The p orbitals always come in sets of four.
E)The d orbitals always have three lobes.
