Atomic Models

Problems

practice

1. An excited electron in a hydrogen atom falls from then = 6 energy level to then = 4 energy level. Determine the following quantities for the emitted photon:
   1. its energy in electronvolts
   2. its energy in joules
   3. its frequency
   4. its wavelength
   5. its momentum
   6. its band in the electromagnetic spectrum
2. Write something.
3. Write something.
4. Write something completely different.

numerical

1. A photon with a frequency of 5.02 × 10¹⁴ Hz is absorbed by an excited hydrogen atom. This causes the electron to be ejected from the atom, forming an ion.
   1. Calculate the energy of the photon in joules.
   2. Determine the energy of the photon in electronvolts.
   3. What is the number of the lowest energy level (closest to the ground state) of a hydrogen atom that contains an electron that would be ejected by the absorption of this photon?
   4. What is the kinetic energy of the ejected electron in electronvolts?
   5. What is the kinetic energy of the ejected electron in joules?
   6. How fast is the electron moving?