Worksheet: Alpha Decay

In this worksheet, we will practice describing the origin and key physical properties of alpha radiation and writing balanced equations for alpha decays.

Q1:

A radioactive nuclide X is converted into an atom of element Y via three 𝛼 decays. What is the nuclide symbol for the daughter atom?

  • A Y
  • B Y
  • C Y
  • D Y
  • E Y

Q2:

How do 𝛼 decays stabilize a nucleus?

  • AThe charge of the nuclide decreases.
  • BThe binding energy per nucleon increases.
  • CThe neutron/proton ratio increases.
  • DThe neutron/proton ratio decreases.
  • EA nucleus with even numbers of protons and neutrons is formed.

Q3:

Which type of decay is the unstable nuclide 235U most likely to undergo?

  • ASpontaneous fission
  • B 𝛼 decay
  • C 𝛽 decay
  • DElectron capture
  • EPositron emission

Q4:

Which type of decay is the unstable nuclide 245Cm most likely to undergo?

  • A 𝛽 decay
  • B 𝛼 decay
  • CSpontaneous fission
  • DElectron capture
  • ENeutron emission

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