Question

Consider the following True/False statements:

6. (0.5 Points) If the spacing between two electronic energy levels in atom A is smaller than in atom B, then the wavelength of the light emitted by atom B will be longer. (True/False)
7. (0.5 Points) If the spacing between two electronic energy levels in atom A is smaller than in atom B, then fewer photons will be emitted by atom B. (True/False)
8. (0.5 Points) Photons are emitted as electrons in the atom jump up in energy. (True/False)
9. (0.5 Points) The colors emitted by an atom does not depend on how much kinetic energy the free electron has when it hits the atom. (True/False)
10. (0.5 Points) When a free electron hits an atom, the atom can be excited to an energy level higher than the KE of the electron. (True/False)
11. (0.5 Points) The kinetic energy of the free electron at the point of collision increases as the voltage of the battery increases. (True/False)
12. (0.5 Points) The kinetic energy of the free electron at the point of collision is higher if the atom is farther from the source of electrons. (True/False)
13. (0.5 Points) The only way to emit infrared (IR) photons is if there are empty electronic energy levels really close to the ground state (lowest energy level). (True/False)
14. (0.5 Points) When atomic electrons are excited to a higher level, they ultimately return to their lowest energy level. (True/False)

Answer 1

6) False

7) True

8) False

9) False

10) False

11) True

12) True

13) True

14) True

Step-by-step explanation:

The spacing between two energy levels in an atom shows the energy difference between them. Clearly, B has a greater value of ∆E compared to A. This implies that the wavelength emitted by B is greater than A while B will emit fewer, more energetic photons.

When atoms jump from lower to higher energy levels, photons are absorbed. The kinetic energy of the incident photon determines the frequency, wavelength and colour of light emitted by the atom.

The energy level to which an atom is excited is determined by the kinetic energy of the incident electron. As the voltage increases, the kinetic energy of the electron increases, the further the atom is from the source of free electrons, the greater the required kinetic energy of free electron. When electrons are excited to higher energy levels, they must return to ground state.