Quark Composition and Particle Charges Quiz
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Questions and Answers

What is the composition of a proton in terms of quarks?

  • uuu
  • uud and udd
  • uud (correct)
  • udd

Which particle consists of three quarks?

  • Neutron (correct)
  • Anti-quark
  • Meson
  • Vertex

What is the charge of a neutron?

  • -1e
  • +2e
  • +1e
  • 0 (correct)

What is the total charge of a particle with the quark composition $uds$?

<p>0 (A)</p> Signup and view all the answers

Which of the following statements accurately describes baryons?

<p>Consist of three quarks (C)</p> Signup and view all the answers

What combination of quarks represents an antiproton?

<p>$ar{u}ar{u}ar{d}$ (B)</p> Signup and view all the answers

What is the charge of the $K^+$ meson, which has the quark composition $uar{s}$?

<p>+1 (C)</p> Signup and view all the answers

Which of the following particles is a meson?

<p>$ar{s}u$ (A)</p> Signup and view all the answers

What is the charge of the Z(4430) particle with the quark combination $ccar{d}ar{u}$?

<p>+1 (B)</p> Signup and view all the answers

Based on the text, what is the charge of a down quark?

<p>-1/3e (D)</p> Signup and view all the answers

Which of the following combinations of quarks could form a positively charged hadron?

<p>u, d, $ar{d}$ (B)</p> Signup and view all the answers

What is the name of the force that binds quarks together within a hadron?

<p>Strong nuclear force (D)</p> Signup and view all the answers

Which of the following is NOT a quark type mentioned in the text?

<p>Bottom (A)</p> Signup and view all the answers

What is the charge of an anti-charm quark?

<p>-2/3e (B)</p> Signup and view all the answers

What is a hadron?

<p>A particle made up of quarks (B)</p> Signup and view all the answers

In beta-minus decay, what particle is emitted along with the transformed quark?

<p>Electron antineutrino (B)</p> Signup and view all the answers

What is the main transform in beta-plus decay?

<p>Up quark to down quark (A)</p> Signup and view all the answers

What is conserved in both types of beta decay?

<p>Charge, lepton number, and baryon number (A)</p> Signup and view all the answers

In the reaction 'udd → u d + e⁻ + ?', what should replace the question mark?

<p>Electron neutrino (D)</p> Signup and view all the answers

What type of particle is a neutrino classified as?

<p>Neutral lepton (A)</p> Signup and view all the answers

Which particle is emitted during beta-plus decay?

<p>Positron (D)</p> Signup and view all the answers

Which fundamental force is responsible for beta decay?

<p>Weak nuclear force (D)</p> Signup and view all the answers

How does charge conservation apply in beta decay?

<p>Total charge remains unchanged (D)</p> Signup and view all the answers

If a neutron decays via beta-plus decay, what is formed?

<p>A proton (A)</p> Signup and view all the answers

Flashcards

Quark

Fundamental particle that makes up hadrons.

Hadrons

Particles made of quarks, such as protons and neutrons.

Anti-quark

Particle corresponding to a quark with opposite charge.

Standard Model

Theory describing fundamental particles and interactions.

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Strong Nuclear Force

Force that binds quarks together within hadrons.

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Charge of Quarks

Quarks have fractional electric charges: +⅔ or -⅓.

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Types of Quarks

Six types: up, down, charm, strange, top, bottom.

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Proton Composition

A proton consists of two up quarks and one down quark (uud).

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Neutron Composition

A neutron is made of one up quark and two down quarks (udd).

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Quark Charge

Up quark has +2/3 charge, down and strange quarks have -1/3 charge.

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Charge Conservation

The total charge in a closed system remains constant, even at the subatomic level.

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Baryons vs Mesons

Baryons are composed of three quarks; mesons consist of one quark and one antiquark.

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Quark Combination for Antineutron

The antineutron consists of three antiquarks: $ar{u}ar{d}ar{d}$.

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K+ Meson Charge

The K+ meson is made of an up quark and a strange antiquark, resulting in a charge of +1.

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Charge of Z(4430)

The Z(4430) particle has a charge of +1 with a combination of $ccar{d}ar{u}$.

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Total Charge of Particle A

Particle A with quark composition uds has a total charge of 0.

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Beta-minus decay

A process where a down quark transforms into an up quark, emitting an electron and an electron antineutrino.

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Beta-plus decay

A process where an up quark transforms into a down quark, emitting a positron and an electron neutrino.

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Electron antineutrino

A neutral particle emitted during beta-minus decay, carrying away energy.

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Positron

The antiparticle of an electron, emitted in beta-plus decay.

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Conserved quantities

Properties that remain unchanged during a decay process, such as charge, mass, and energy.

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Quark transformation

The process by which quarks change type during beta decay, altering particle properties.

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Neutrino charge

A neutrino has no charge; it is neutral.

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Beta decay equation example

A representation of beta decay; for beta-plus: n → p + e⁺ + ν.

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