P6.1.5 - Radiation In And Out Of Atoms Flashcards
Why do electrons not spiral into the nucleus?
The electrons are at fixed energy levels
What energy level do electrons usually occupy?
The smallest energy level, with the shortest distance away from the nucleus
Describe the photon model.
Electromagnetic radiation is emitted and absorbed as packets of energy, called photons, and the energy of each photon is proportional to the frequency
How can an electron move to a higher energy level?
If a photon is at the right energy level it can ‘excite’ the electron and make it move to a higher energy level
What does an absorption spectrum show?
A set of frequencies of radiation absorbed by an atom when electrons move to higher energy levels
What happens when an electron moves from a higher energy level to a lower energy level?
It emits radiation
What does an emission spectrum show?
A set of frequencies of radiation emitted by an atom when excited electrons move to lower energy levels
What does the frequency of radiation emitted depend on?
The difference in energy of the energy levels
What type of photons can carbon atoms emit?
X-Ray
Which electromagnetic wave has the highest energy radiation?
Gamma
Which photon from a hydrogen atom has the highest energy?
Ultraviolet
