Problems
practice
- 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:
- its energy in electronvolts
- its energy in joules
- its frequency
- its wavelength
- its momentum
- its band in the electromagnetic spectrum
- Write something.
- Write something.
- Write something completely different.
numerical
- 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.
- Calculate the energy of the photon in joules.
- Determine the energy of the photon in electronvolts.
- 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?
- What is the kinetic energy of the ejected electron in electronvolts?
- What is the kinetic energy of the ejected electron in joules?
- How fast is the electron moving?