Worksheets7.3 Particle Physics review
Total questions: 28
Worksheet time: 15mins
In the standard model, the particle considered to be an elementary particle is a(n)
proton
neutron
electron
alpha particle
All of the following are quarks except
strange
bottom
charmed
fundamental
A proton is made up of two up quarks and one down quark with charges of +2/3, +2/3, and –1/3.
True
False
More information is needed
In our universe, bosons carry forces, fermions make up matter.
True
False
All baryons are assigned a baryon number of ___, all anti-baryons are assigned ___, and all non-baryons are ___
-1, +1, 0
-1, 0, +1
+1, -1, 0
0, -1, +1
All leptons are assigned a lepton number of ___, all anti-leptons are assigned ___, and all non-leptons are ___
-1, +1, 0
-1, 0, +1
+1, -1, 0
0, -1, +1
There are three families of leptons;
electron, muon, and pi.
electron, muon, and tau.
electron, pi and tau.
electron, pi and neutrino.
The main three conservation laws used in particle physics are:
Conservation of charge, baryon and lepton numbers.
Conservation of gravity, charge and lepton numbers.
Conservation of momentum, hadron and lepton numbers.
Conservation of charge, hadron and lepton numbers.
Using the conservation laws, state which interaction is possible:
proton + electron => neutron + neutrino (e-)
proton + neutron ==> proton + proton + anti-proton
Which quarks form a neutron?
up, up, down
down, down, down
up, up, up
up, down, down
What is the standard model?
It explains how particles interact. The model divides all matter into fermions (quarks and leptons) and bosons (exchange particles).
It explains how atoms interact. The model divides all matter into fermions (quarks and leptons) and bosons (exchange particles).
It explains how nuclei interact. The model divides all matter into fermions (quarks and leptons) and bosons (exchange particles).
It explains how molecules interact. The model divides all matter into fermions (quarks and leptons) and bosons (exchange particles).
Which particle is a meson?
proton
pion
muon
photon
neutron
In a particle decay, new particles move off in opposite directions to conserve...
charge and kinetic energy
momentum and charge
momentum and quark number
momentum and strangeness
The difference between a baryon and a meson is...
Mesons are made up of quarks and baryons are made up of antiquarks.
Mesons are made up of 2 quarks (antiquarks) but baryons are made up of 3.
Mesons not affected by the strong nuclear fore but baryons are.
Mesons are fundamental particles but baryons are not.
Rank the four fundamental forces of nature in order from weakest to strongest:
Electromagnetism, Gravity, Strong Nuclear, Weak Nuclear
Weak Nuclear, Gravity, Electromagnetism, Strong Nuclear
Gravity, Weak Nuclear, Electromagnetism, Strong Nuclear
Weak Nuclear, Electromagnetism, Gravity, Strong Nuclear
What is a proton?
hadron
a particle consisting of two down quarks and one up quark
a positive fundamental particle
a positive lepton
Which row gives the correct classification of protons, electrons, and neutrinos?
A
B
C
D
Which Feynman diagram could show an electron emitting a photon. Time is horizontal (no rotating the pictures!)
Which Feynman diagram could show a positron emitting a photon. Time is horizontal (no rotating the pictures!)
Which Feynman diagram could show an electron and positron being produced by a photon?
Which diagram represents the process of beta-plus decay?
Which Feynman diagram could show a anti-muon absorbing a photon?
Which force can Leptons not experience?
Strong nuclear
Weak nuclear
Electromagnetic
Gravitational
This diagram is supposed to show beta-plus decay?
What is the mistake with it?
the W should be negative
the boson line should be curly
the B+ arrow should be in the opposite direction
the neutrino arrow should be in the opposite direction
the down quark should decay into an up quark
Which of the following shows electron capture? (time is on the y axis)
Responsible for keeping the quarks together.
γ photon
g gluon
e eclecton
μ muon
Which of these is the exchange boson for the strong nuclear force?
The gluon
The W-
The W+
The Z0
The graph of neutron number against proton number shows three nuclei P, Q and R.
Which row identifies an isotope of P and the nucleon number of this isotope of P?
Isotope of P: Q
Nucleon number of isotope of P: y + 1
Isotope of P: Q
Nucleon number of isotope of P: x + y + 1
Isotope of P: R
Nucleon number of isotope of P: x + y + 1
Isotope of P: R
Nucleon number of isotope of P: x + 1
