Feynman Diagrams

Which of these is the exchange particle for the strong nuclear force?

• The pion

• The W^-

• The W⁺

• The Z⁰

Why do some radioisotopes undergo Beta-minus decay?

• Their nucleus contains too many electrons and they need to eject them

• Their nucleus has too many protons and is unstable

• Their nucleus has too many neutrons and is unstable

• Electrons fall into the nucleus from the inner shell and are then ejected

In beta-plus decay which force exchange particle is involved?

• W⁺

• W^-

• gluon

• photon

In beta-minus decay which force exchange particle is involved?

• W^-

• W⁺

• gluon

• photon

Which diagram represents the process of beta-plus decay?

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Tags

NGSS.HS-PS1-8

Which of the following does not give the correct exchange particle for the process?

• Process: gravitational attraction

  Exchange particle: W boson

• Process: electrostatic repulsion of electrons

  Exchange particle: virtual photon

• Process: strong interaction

  Exchange particle: pion

• Process: β⁻ decay

  Exchange particle: W boson

When bombarded with an α particle the nuclide ²⁵₁₂Mg changes into another nuclide with the emission of a neutron and γ radiation.

What are the correct values for the nucleon number and proton number of the nuclide which is formed?

• Nucleon number: 29

  Proton number: 14

• Nucleon number: 29

  Proton number: 12

• Nucleon number: 28

  Proton number: 14

• Nucleon number: 27

  Proton number: 12

Tags

NGSS.HS-PS1-8

Electron capture can be represented by the following equation.

p + e^– → X + Y

Which row correctly identifies X and Y?

• X: p

  Y: K^–

• X: e^–

  Y: e⁺

• X: n

  Y: V_e

• X: n

  Y: π⁰

Tags

NGSS.HS-PS1-8

The nucleus of ⁹₄Be captures a proton and emits an α particle. What is the product nucleus?

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Tags

NGSS.HS-PS1-8

An electron collides with a neutral atom and ionizes it. Which of the following describes the particles present after the collision?

• An electron and an excited atom.

• An excited atom containing an excess electron.

• Two electrons and a positive ion.

• Two electrons and a neutral atom in the ground state.