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Lesson: Beta Decay and Electron Capture

Worksheet • 18 Questions

Q1:

A radioactive nuclide 𝐴 𝑍 X decays into an atom of element Y via a single electron capture. What is the nuclide symbol for the daughter atom?

  • A 𝐴 𝑍 1 – Y
  • B 𝐴 1 𝑍 + Y
  • C 𝐴 𝑍 1 + Y
  • D 𝐴 1 𝑍 1 + + Y
  • E 𝐴 1 𝑍 1 – – Y

Q2:

A nuclear decay produces a particle with a charge of βˆ’ 1 and a mass of 9 . 1 0 9 Γ— 1 0 βˆ’ 3 1 kg. What name is given to this particle?

  • A 𝛽 βˆ’ particle
  • BNeutrino
  • C 𝛼 particle
  • D 𝛽 + particle
  • EPositron

Q3:

Which reaction is most likely to take place in a light element with a high neutron/proton ratio?

  • A 𝛽 βˆ’ decay
  • BSpontaneous fission
  • C 𝛽 + decay
  • DElectron capture
  • E 𝛼 decay

Q4:

Which type of decay is the unstable nuclide 9 L i most likely to undergo?

  • A 𝛽 βˆ’ decay
  • BElectron capture
  • CPositron emission
  • DProton emission
  • E 𝛼 decay

Q5:

A nucleus decays be emitting a positron and a second particle.

What is the identity of the second particle?

  • AElectron neutrino
  • BPhoton
  • CElectron antineutrino
  • DMuon antineutrino
  • EMuon neutrino

Emission of the second particle is needed to conserve which quantized property?

  • ALepton number
  • BMass-energy
  • CBaryon number
  • DCharge
  • ENucleon number

Q6:

An atom of 7 2 G e is stable. Which of the following unstable atoms would be most likely to decay via electron capture?

  • A 7 1 G e
  • B 7 2 G a
  • C 7 3 G e
  • D 7 0 Z n
  • E 7 2 Z n

Q7:

Which of the following nuclei is most likely to decay by positron emission?

  • AManganese-51
  • BCobalt-58
  • CChromium-53
  • DVanadium-50
  • EIron-59

Q8:

Following a 𝛽 βˆ’ decay, why might a 𝛾 ray also be emitted?

  • ATo conserve mass-energy
  • BTo conserve spin
  • CTo conserve charge
  • DTo conserve lepton number
  • ETo conserve baryon number

Q9:

A nuclear decay is described by the equation:

Identify the particle X .

  • A 𝜈 e
  • Bp+
  • C 𝜈 e
  • D e βˆ’
  • Ee+

Q10:

A radioactive nuclide 𝐴 𝑍 X decays into an atom of element Y via a single positron emission. What is the nuclide symbol for the daughter atom?

  • A 𝐴 𝑍 1 – Y
  • B 𝐴 1 𝑍 – Y
  • C 𝐴 𝑍 1 + Y
  • D 𝐴 1 𝑍 1 + + Y
  • E 𝐴 1 𝑍 1 – – Y

Q11:

The nucleus of an atom captures an inner-shell electron and two particles of non-zero mass are emitted. What are the identities of these two particles?

  • AElectron and neutrino
  • BNeutron and antineutrino
  • CElectron and antineutrino
  • DNeutron and neutrino
  • ENeutron and electron

Q12:

When an atom decays by internal conversion, the energy of the nucleus decreases and an electron is emitted. Which of the following statements is true?

  • AThe charge of the atom changes.
  • BThe mass number of the atom changes.
  • CThe electron is emitted from the nucleus.
  • DThe electron can be referred to as a 𝛽 particle.
  • EAn antineutrino is also emitted.

Q13:

An atom of nickel-59 decays by electron capture.

Which particle is emitted during this decay?

  • AElectron neutrino
  • BNeutron
  • CElectron antineutrino
  • DPositron
  • EElectron

What is the change in the atomic number of the atom during this decay?

Which isotope is produced by this decay?

  • ACobalt-59
  • BCopper-58
  • CCobalt-58
  • DCopper-59
  • ENickel-58

Q14:

Which of the following processes causes the atomic number of an atom to increase?

  • A 𝛽 βˆ’ decay
  • BSpontaneous fission
  • C 𝛼 decay
  • DElectron capture
  • E 𝛽 + decay

Q15:

Which of the following processes causes the number of nucleons in an atom to decrease?

  • A 𝛼 decay
  • B 𝛾 emission
  • C 𝛽 βˆ’ decay
  • DElectron capture
  • E 𝛽 + decay

Q16:

When an atom decays by electron capture, an X-ray photon may be released. What determines the frequency of the X-ray photon?

  • AThe spacing of the innermost electron orbitals.
  • BThe potential energy of the captured electron.
  • CThe change in nuclear binding energy.
  • DThe spacing of the outermost electron orbitals.
  • EThe kinetic energy of the parent atom.

Q17:

A radioactive nuclide 𝐴 𝑍 X decays into an atom of element Y via a single 𝛽 -decay. What is the nuclide symbol for the daughter atom?

  • A 𝐴 𝑍 1 + Y
  • B 𝐴 1 𝑍 1 – + Y
  • C 𝐴 𝑍 1 – Y
  • D 𝐴 1 𝑍 1 + + Y
  • E 𝐴 1 𝑍 1 – – Y

Q18:

Which type of decay is the unstable nuclide 3 7 C a most likely to undergo?

  • APositron emission
  • BSpontaneous fission
  • C 𝛽 βˆ’ decay
  • DProton emission
  • E 𝛼 decay
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