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Worksheets003 - Quarks and Leptons
Total questions: 35
Worksheet time: 35mins
What do we call a particle that is not made up of any smaller particles?
• Atomic particle
•Minimum particle
•Original particle
Fundamental Particle
•Base particle
•Light is made up of what type of elementary particles?
•Quarks
•Leptons
• Photons
• Gluons
•All of the above
•What type of particles are electrons?
•Quarks
•Leptons
• Photons
Bosons
•What elementary particles are the building blocks for protons and neutrons?
•Quarks
• Leptons
• Photons
• Gluons
•How many quarks make up a proton?
0
1
2
3
4
•What particle is made up of two 'down' quarks and one 'up' quark?
•Atom
• Electron
• Neutron
• Proton
• Tachyon
What are bosons?
Elementary crew members on merchant vessels
A term in particle physics used to describe matter
Subatomic particles that carry forces
An electron switch used in nano-circuits
Which of the following sentences about antimatter is NOT true:
Antimatter is normal matter with an opposite mass
Antimatter is only produced in particle accelerators
Antimatter annihilates matter
Equal amounts of antimatter and matter were created during the Big Bang
Often seen with the up quark, its partner in the "first generation of matter", the down quark is slightly heavier and just as fun. In terms of e (the charge of a proton), what is the electric charge of a down quark?
+2/3 e
-e
+e
-1/3 e
Which of the following is not true?
Each meson consists of a single quark and a single antiquark.
Each baryon consists of three quarks.
The magnitude of the charge on every quark is ⅓
A particle consisting of a single quark has not been observed.
What is the quark structure for antiprotons?
u̅d̅
d̅d̅s̅
d̅d̅u̅
u̅u̅d̅
An iodine nucleus decays into a nucleus of Xe−131, a beta-minus particle and particle Y.
Which is a property of particle Y?
It has a lepton number of +1
It is an antiparticle
It is negatively charged
It experiences the strong interaction
What of the following is a hadron of zero charge?
neutrino
photon
proton
neutron
What are the numbers of hadrons, baryons and mesons in an atom of 73Li?
hadrons: 7
baryons: 3
mesons: 3
hadrons: 7
baryons: 4
mesons: 4
hadrons: 7
baryons: 7
mesons: 0
hadrons: 10
baryons: 7
mesons: 0
What is the charge of the particle that has udd quarks?
+1
0
-1
What is the charge of the particle that has uud quarks?
+1
0
-1
Which diagram represents the process of beta-plus decay?
Which of the following is not true?
Each meson consists of a single quark and a single antiquark.
Each baryon consists of three quarks.
The magnitude of the charge on every quark is ⅓
A particle consisting of a single quark has not been observed.
Which of the following is not made of quarks?
kaon
muon
neutron
pion
What is the quark structure for antiprotons?
u̅d̅
d̅d̅s̅
d̅d̅u̅
u̅u̅d̅
An iodine nucleus decays into a nucleus of Xe−131, a beta-minus particle and particle Y.
Which is a property of particle Y?
It has a lepton number of +1
It is an antiparticle
It is negatively charged
It experiences the strong interaction
The decay of a neutral kaon K0 is given by the equation
K0 → X + Y + v̅e
What are X and Y?
e+ and e–
μ+ and e–
π+ and e–
π– and e+
Fluoride ions are produced by the addition of a single electron to an atom of fluorine 199F
What is the magnitude of specific charge of the fluoride ion?
3.2 × 10–26 C kg–1
8.4 × 10–21 C kg–1
5.0 × 106 C kg–1
4.5 × 107 C kg–1
When a nucleus of the radioactive isotope 6528Ni decays, a β– particle and an electron antineutrino are emitted.
How many protons and neutrons are there in the resulting daughter nucleus?
Number of protons: 28
Number of neutrons: 65
Number of protons: 29
Number of neutrons: 65
Number of protons: 29
Number of neutrons: 36
Number of protons: 30
Number of neutrons: 35
In a nuclear reaction 147N is bombarded by neutrons. This results in the capture of one neutron and the emission of one proton by one nucleus of 147N. The resulting nucleus is
23692U undergoes a series of decays to produce 20482Pb
How many alpha decays are involved in this decay series?
5
6
8
10
A radioactive nucleus emits a β–. particle then an α particle and finally another β–. particle. The final nuclide is
an isotope of the original element
the same element with a different proton number
a new element of higher proton number
a new element of lower nucleon number
Which of the following shows β- decay?
Which of the following shows β+ decay?
In the standard model, which of the following is fundamental?
proton
neutron
electron
alpha particle
These are light, elementary particles that are not made up of quarks.
Gluons
Electrons
Leptons
Baryon
These are the category of hadrons that contain three quarks. This distinguishes them from mesons, which contain two (1 quark and 1 antiquark).
Gluons
Electrons
Leptons
Baryons
Three of the 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.
In a particle decay, new particles move off in opposite directions to conserve...
kinetic energy
momentum
quark number
strangeness
