Question

The energy level diagram of the hydrogen atom is shown the figure below. An atom generally has an electron in a given energy level, however, a transition may occur if the atom absorbs or emits a photon, or particle of light.

Note: The energy of a photon can be written as \(E_{v}=h c / \lambda\) and the constants \(h c=1240 \mathrm{eV}-\mathrm{nm}\).

1. In the Bohr model of the atom, energy is radiated when

A. an electron falls from an outer energy level to an inner level

B. an electron is stripped from an atom

C. an ion is formed

D. light shines on an atom

2. The \(n=3\) to 2 transition corresponds to the first of many spectroscopic lines of the

A. Balmer series

B. Lyman series

C. Paschen series

D. none of the above

3. What is the wavelength of light corresponding to a transition from the \(n=3\) to 2 state?

A. \(1240 \mathrm{~nm}\)

B. \(656 \mathrm{~nm}\)

C. \(122 \mathrm{~nm}\)

D. \(103 \mathrm{~nm}\)

E. \(91 \mathrm{~nm}\)

4. If a hydrogen atom is initially in the \(\mathrm{n}=3\) state, which of the following photon emission energies are possible?

A. \(1.9 \mathrm{eV}\) only

B. \(10.2 \mathrm{eV}\) only

C. \(12.0 \mathrm{eV}\) only

D. \(1.910 .2\), and \(12.1 \mathrm{eV}\)

E. \(1.9,10.2\), and \(13.6 \mathrm{eV}\)

5. The second line of the Balmer series would correspond to what transition?

A. \(n=2\) to 1

B. \(n=3\) to 1

C. \(n=3\) to 2

D. \(n=4\) to 2

6. The color of the light emitted in the \(n=3\) to 2 transition is

A. red

B. blue-green

C. blue

D. violet

E. ultra-violet

7. What is the smallest energy an aborbed photon must have to boost the hydrogen atom in its ground state to an excited state?

A. \(3.4 \mathrm{eV}\)

B. \(10.2 \mathrm{eV}\)

C. \(13.6 \mathrm{eV}\)

D. There is no smallest energy.

8. A hydrogen atom in its ground state absorbs a photon and ends up in the excited state corresponding to \(n=3 .\) What can be concluded about the photon?

A. The photon had an energy of \(1.51 \mathrm{eV}\)

B. The photon had an energy of \(3.4 \mathrm{eV}\)

C. The photon had an energy of \(10.2 \mathrm{eV}\).

D. The photon had an energy of \(12.1 \mathrm{eV}\).

9. What is the energy required to ionize a hydrogen atom? Note: The ionization energy is the energy required to remove an electron in the ground state entirely from the atom.

A. \(1.8 \mathrm{eV}\)

B. \(10.2 \mathrm{eV}\)

C. \(12.0 \mathrm{eV}\)

D. \(13.6 \mathrm{eV}\)

E. not enough information given

10. Which scientist is credited with discovering absorption lines in solar spectrum using a diffraction grating.

A. Rutherford

B. Balmer

C. Rydberg

D. Fraunhofer

E. Bohr

Answer 1