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CAIE A-Level Physics AS 11.1.3 Nucleon Number and Proton Number Questions

Distinguish proton and nucleon numbers, then calculate neutron counts and particle totals from nuclide notation, isotope data and charged atoms.

Syllabus
2028–2030
Course
Physics 9702
Level
AS

Exam points

  • Distinguish proton number Z from nucleon number A, the total protons plus neutrons.
  • Calculate neutron number as A−Z and use nuclide data to determine particle counts.

CAIE A-Level Physics AS 11.1.3 Nucleon Number and Proton Number Questions question 1

[Maximum number: 1]

Nucleus Q undergoes radioactive decay to form nucleus R, emitting an antineutrino and another particle X, as shown in the decay equation.

Q→R+X+vˉQ \rightarrow R+X+\bar{v}

Compare the nucleon numbers of Q and R.

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