TOPIC TWO - Particle Physics Flashcards
What happens when electron no. changes?
Ion
What happens when neutron no. changes?
Isotope
What happens when proton no. changes?
Different element
What is specific charge?
The charge per unit
How do you work out specific charge?
Charge/mass
What is the purpose of strong nuclear force?
Acts within the nucleus to overcome the electrostatic repulsion between protons,
Therefore keeps the nucleus stable by keeping protons and neutrons together
What is the exchange particle for strong nuclear force?
Pion
What is the distance of attraction for strong nuclear force?
0.5 fm - 3/4 fm
What is the distance of repulsion for strong nuclear force?
< 0.5 fm
What is weak nuclear force used for?
Beta +/- decay
What is the exchange particle for weak nuclear force?
W+ / W- boson
What is the use of electromagnetic force?
Allows charged particles to attract or repel
What is the exchange particle for electromagnetic force? What is its use?
Virtual photon
Carries electromagnetic force between charged particles
What is the exchange particle for gravity?
Graviton
What is the definition of photoelectric effect?
When e-are emitted from the surface of a metal when light shines on it