You already know about mass and charge but these quantities alone are not sufficient to describe all of the particles discovered so far. Here we introduce spin.
You should also consider colour, flavour and strangeness.
Key Concepts
Use quizzes to practise application of theory.
START QUIZ!
an electron has spin
spin can't be negative
Which of the particles that make up an atom are fundamental particles?
proton and neutron are made of quarks
What is the charge of a neutrino?
Hence the name
During beta- decay a neutron decays into a proton plus an electron and an anitneutrino.
This must be an antineutrino to conserve
no leptons on the left so antineutrino must cancel electron
In which list are different types of particles arranged in order of mass (smallest first)?
lepton - light, meson - medium, baryon - heavy
What is the ratio of strong force / electromagnetic force between two protons in the nucleus
strong force is 100 times stronger but much shorter range
Which type of interaction is beta decay?
It involves a neutrino so must be weak
The spin of a meson is
made of 2 quarks each of spin 1/2. These can be aligned or unaligned.
The photon takes part in which interactions?
The photon is the exchange particle in electromagnetic interactions
Below is a hypothetical interaction:
if A is a baryon B could be a -
A with a hat on is an antiparticle so baryon number on the left = 0
How much of Particle properties have you understood?
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