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U4T3 STANDARDMODEL

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Questions and Answers

The Standard Model

The theory that says that all known matter particles are composites of quarks and leptons and that these interact by exchanging force-carrier particles called bosons.

Define the concept of an elementary particle and anti-particle

Elementary particles are the building blocks of the universe and are not composed of other particles. Anti-particles have the same mass and opposite charge of their corresponding particle.

Recall the different types of elementary particles

Quarks, leptons, and gauge bosons.

Recall the six types of quarks

Up, down, charm, strange, top and bottom. Signup and view all the answers

Quarks are fundamental particles that interact via the ____________.

Strong Nuclear Force (SNF) Signup and view all the answers

Define the terms 'baryon' and 'meson'

Baryons are composite subatomic particles made up of three quarks held together by the Strong Nuclear Force (SNF). Examples of baryons are a neutron or proton. Mesons are subatomic particles composed of one quark and one antiquark, and held together by the Strong Nuclear Force (SNF). Signup and view all the answers

Recall the six types of leptons

Electron, electron neutrino, muon, muon neutrino, tau, and tau neutrino. Signup and view all the answers

Leptons are a class of elementary particles that interact via the _______________.

Weak Nuclear Force (WNF) and if charged will also interact via the electromagnetic force. Signup and view all the answers

Recall the four types of gauge bosons

Gluon, photon, W boson and Z boson. Signup and view all the answers

Gluon is an elementary particle that acts as the exchange particle for what force?

Strong nuclear force (B) Signup and view all the answers

Photon are the mediating particle for what force?

Electromagnetic force (C) Signup and view all the answers

W bosons and Z bosons act between quarks and leptons and they mediate what force?

Weak nuclear force (A) Signup and view all the answers

Match the elementary particle/s experiencing the force to the force

Quarks = Strong Nuclear Force (SNF) All quarks and electrically charged leptons = Electromagnetic Force All quarks and all leptons = Weak Nuclear Force (WNF) e.g. Elementary Particle/s = e.g. ___ Force Signup and view all the answers

Match these fundamental forces with relationship

e.g. Fundamental force = e.g. Relationship Strong Nuclear Force (SNF) = As distance increases, strength increases Weak Nuclear Force (WNF) = Radioactive decay Electromagnetic Force = Attractive and repulsive force Signup and view all the answers

Match the fundamental forces to the mediating particle

e.g. Fundamental force = e.g. Mediating particle Strong Nuclear Force = Gluon, g Electromagnetic Force = Photon, y Weak Nuclear Force = W and Z bosons Signup and view all the answers

What are hadrons and what types?

Hadrons are subatomic particles made up of combination of quarks. Examples of hadrons are mesons and baryons. Signup and view all the answers

What are fermions?

Particles that are considered "matter" Signup and view all the answers

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