The Bohr theory does not predict that
a. hydrogen atoms will give off the lines from the Balmer series.
b. the ground state of hydrogen is spherically symmetric.
c. it requires 13.6 eV to ionize hydrogen.
d. the approximate radius of a hydrogen atom is 5.3 1011 m.
[Ques. 2] The emission of a line from the Balmer series is followed almost immediately by the emission of a line from the Lyman series. This will be true for
a. only the first line of the Balmer series and the first line of the Lyman series.
b. all the lines of the Balmer series followed by only the first line of the Lyman series.
c. only the first line of the Balmer series followed by any of the lines of the Lyman series.
d. all the lines of the Balmer series followed by any of the lines of the Lyman series.
[Ques. 3] The visible lines from hydrogen are all members of the
a. Lyman series.
b. Balmer series.
c. Paschen series.
d. Brackett series.
[Ques. 4] The four visible colors emitted by hydrogen atoms are produced by electrons
a. that start in the ground state.
b. that end up in the ground state.
c. that start in the level with n = 2.
d. that end up in the level with n = 2.
[Ques. 5] The ionization energy of the hydrogen atom is 13.6 eV. What is the wavelength of a photon having this much energy? (h = 6.63 1034 Js, c = 3.00 108 m/s, 1 eV = 1.6 1019 J, and 1 nm = 109 m)
a. 91.4 nm
b. 136 nm
c. 273 nm
d. 360 nm
[Ques. 6] The Lyman series of hydrogen corresponds to electron transitions from higher levels to n = 1 . What is the longest wavelength in that series? (R = 1.097 107 m1 and 1 nm = 109 m)
a. 91.4 nm
b. 122 nm
c. 273 nm
d. 456 nm
[Ques. 7] The Paschen series of hydrogen corresponds to electron transitions from higher levels to n = 3 . What is the shortest wavelength in that series? (R = 1.097 107 m1 and 1 nm = 109 m)
a. 1875 nm
b. 820 nm
c. 1580 nm
d. 656 nm
e. 1094 nm
[Ques. 8] If the radius of the electron orbit in the n = 1 level of the hydrogen atoms is 0.052 9 nm, what is its radius for the n = 4 level? (Assume the Bohr model is valid).
a. 0.212 nm
b. 0.045 nm
c. 0.716 nm
d. 0.846 nm
e. 0.920 nm
[Ques. 9] The ionization energy of the hydrogen atom is 13.6 eV. What is the energy of a photon emitted corresponding to a transition from the n = 5 to n = 3 state?
a. 0.97 eV
b. 1.81 eV
c. 3.40 eV
d. 6.80 eV
e. 0.24 eV
[Ques. 10] The ionization energy of the hydrogen atom is 13.6 eV. What is the energy of the n = 7 state?
a. 11.7 eV
b. 11.7 eV
c. 0.28 eV
d. 0.28 eV
e. 1.94 eV
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