Choose the correct answer for each question.

1. When an electron jumps from a lower orbit to a higher orbit in an atom (you must choose all correct choices to get this problem correct)

   1. energy is absorbed by the electron.
   2. energy is released by the electron.
   3. a photon is released.
   4. the electron goes into an "excited" state.
   5. a spectral emission line can be seen.
   Check

2. The maximum number of electrons allowed in an orbital of a p-sublevel is

   1.   ?    2
   2.   ?    3
   3.   ?    4
   4.   ?    5
   5.   ?    6

3. The maximum number of electrons allowed in the third orbit of the Bohr model of the atom is

   1.   ?    2
   2.   ?    8
   3.   ?    18
   4.   ?    32
   5.   ?    50

4. The energy of a photon emitted by an atom from an electron making a jump from an excited state to a ground state with an energy difference of 4.2x10^-19J is

   1.   ?    2.1x10^-19J
   2.   ?    4.2x10^-19J
   3.   ?    The photon doesn't possess any energy.
   4.   ?    Not enough information given.

5. Determine the ionization energy (in J) required to remove an electron from the 2nd Bohr orbit of a hydrogen atom.

   1.   ?    3.19x10^-19J
   2.   ?    1.60x10^-19J
   3.   ?    2.99x10^-18J
   4.   ?    4.00x10^-19J
   5.   ?    5.45x10^-19J

6. What is the wavelength of an electromagnetic wave with a frequency of 92.3MHz?

   1.   ?    3.25x10^-7m
   2.   ?    3.25x10⁶m
   3.   ?    3.25x10^-10m
   4.   ?    3.25m

7. In order of increasing energy, the electromagnetic spectrum is

   1.   ?    radio, X-ray, visible, infrared, ultraviolet, microwave, gamma
   2.   ?    radio, microwave, infrared, visible, ultraviolet, X-ray, gamma
   3.   ?    microwave, radio, infrared, visible, ultraviolet, X-ray, gamma
   4.   ?    infrared, microwave, radio, visible, ultraviolet, X-ray, gamma
   5.   ?    radio, microwave, infrared, visible, ultraviolet, gamma, X-ray

8. The range of the visible spectrum is about _________________, with ________________ being the most energetic.

   1.   ?    300-500nm, blue
   2.   ?    300-600nm, red
   3.   ?    400-700nm, violet
   4.   ?    400-700nm, red

9. Which one of the following is not an allowed set of quantum numbers?

   1.   ?    2,1,1,+1/2
   2.   ?    3,2,-1,-1/2
   3.   ?    3,2,3,+1/2
   4.   ?    1,0,0,-1/2

10. What is the first principal energy level to have a d-sublevel?

    1.   ?    1
    2.   ?    2
    3.   ?    3
    4.   ?    4

11. Calculate the DeBroglie wavelength for a proton traveling at 2.50x10⁵m/s.

    1.   ?    1.58nm
    2.   ?    1.58pm
    3.   ?    2.79pm
    4.   ?    3.77nm
    5.   ?    2.00nm

12. What is the energy in kJ/mol for photons with a wavelength of 500.nm?

    1.   ?    127kJ
    2.   ?    239kJ
    3.   ?    67.5kJ
    4.   ?    357kJ
    5.   ?    194kJ

13. What is the frequency of a photon with an energy of 3.06x10^-19J?

    1.   ?    4.62x10¹⁴Hz
    2.   ?    2.11x10¹⁴Hz
    3.   ?    9.80x10²⁶Hz
    4.   ?    9.18x10^-11Hz

14. How many sublevels are there for the 3rd energy level in the wave-mechanical model of the atom?

    1.   ?    1
    2.   ?    2
    3.   ?    3
    4.   ?    4
    5.   ?    None of these

15. The Rutherford gold foil experiment determined

    1. the charge to mass ratio of the electron.
    2. that the plum pudding model of the atom was correct.
    3. the existence of a dense, positively charged nucleus.
    4. the existance of the neutron.
    5. All of the above were determined from this experiment.
    Check