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CAIE A-Level Physics AS 11.1.4 Isotopes Are Forms of the Same Element with Different Numbers of Neutrons in Questions

Identify isotopes by matching proton numbers for the same element and distinguishing their neutron counts in nuclide symbols, tables and exam data.

Syllabus
2028–2030
Course
Physics 9702
Level
AS

Exam points

  • Identify isotopes as nuclei of the same element with the same proton number but different neutron numbers.
  • Compare isotope compositions by matching proton numbers and distinguishing their neutron counts.

CAIE A-Level Physics AS 11.1.4 Isotopes Are Forms of the Same Element with Different Numbers of Neutrons in Questions question 1

[Maximum number: 2]

Nucleus P and nucleus Q are isotopes of the same element.
Nucleus Q is unstable and emits a β−\beta^{-}particle to form nucleus R.

For nuclei P and Q , compare:
- the number of protons
- the number of neutrons.

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