What is a particle that is not made of any smaller particles?
elementary particle
minimum particle
original particle
atomic particle
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Syllabus Edition
First teaching 2023
First exams 2025
What is a particle that is not made of any smaller particles?
elementary particle
minimum particle
original particle
atomic particle
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Light is made up of which type of elementary particle?
quarks
leptons
photons
bosons
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What type of elementary particles are electrons ?
quarks
leptons
photons
bosons
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What elementary particles are the building blocks for protons and neutrons ?
quarks
leptons
photons
bosons
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How many quarks make up a proton ?
0
1
2
3
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Which particle is made up of two 'down' quarks and one 'up' quark?
atom
electron
neutron
proton
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How many types of quark are there ?
2
4
6
8
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Which elementary particle is a lepton ?
neutron
electron
quark
proton
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What are the fundamental particles of an atom ?
quarks, gluons and electrons
protons, neutrons and electrons
quarks, photons and electrons
quarks, gluons and neutrino
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What are mesons ?
a type of composite particle produced by high energy
a type of gluon
an antimatter version of the electron
a type of neutrino
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Which of the following sentences about antimatter is incorrect ?
antimatter is normal matter with an opposite charge
antimatter is only produced in particle accelerators
antimatter destroys matter
equal amounts of antimatter and matter were created during the Big Bang
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Fundamental or elementary particles are particles that aren't made up of smaller particles.
What is the most common type of fundamental particle in the universe ?
atom
meson
neutrino
quark
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In a nucleus of Tritium, , how many ‘down’ quarks are there?
5
4
3
2
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Which row in the table gives the correct quark combination for the particle?
|
Particle |
Category |
Quark combination |
A |
neutron |
baryon |
|
B |
neutron |
meson |
|
C |
proton |
baryon |
|
D |
positive pion |
meson |
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What are the numbers of hadrons, baryons and mesons in an atom of ?
|
Hadrons |
Baryons |
Mesons |
A |
7 |
3 |
3 |
B |
7 |
4 |
4 |
C |
7 |
7 |
0 |
D |
10 |
7 |
0 |
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Quarks are thought to make up protons and neutrons.
The 'up' quark has a charge of ; a 'down' quark has a charge of , where e is the elementary charge (+ 1.6 × 10–19 C)
How many up quarks and down quarks must a proton contain ?
|
Up quarks |
Down quarks |
A |
0 |
3 |
B |
2 |
1 |
C |
1 |
2 |
D |
1 |
1 |
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A CERN detector shows a signal only in the hadronic calorimeter. No signal is observed in the tracker, electromagnetic calorimeter or muon chambers.
Which particle must be responsible for this signal?
pion
neutrino
photon
neutron
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Some particles are made up of a combination of three quarks.
Which particle would not give a particle a charge of either +1.6 × 10−19 C or zero?
up, up, up
up, up, down
up, strange, strange
up, down, down
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The composition of four different hadrons are shown in the diagram below. One of the hadrons is a Σ + particle. It has a charge of +e, where is e is the elementary charge.
Which hadron could be the Σ + particle ?
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When high-speed hadrons collide in particle accelerators, a positive pion (π+) is an unstable particle produced. The π+ particle has a charge of +e.
What is the quark combination of the π+ particle?
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A graph of nucleon number A against proton number Z is shown in the diagram below.
The graph shows a cross that represents a nucleus P.
Nucleus P decays by emitting an α-particle to form a nucleus Q.
Nucleus Q then decays by emitting a β– particle to form a nucleus R.
The quark composition of one nucleon in Q is changed during the emission of the β– particle.
What is the corresponding change in quark composition from nucleus Q to nucleus R ?
no change
u-quark to d-quark
d-quark to u-quark
d-quark to s-quark
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The equation for β– decay is
Using your knowledge of antiparticles and the weak interaction, what is the equation for β+ decay?
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