CAIE A-Level Physics 11.1.4 Isotopes

Practise identifying isotopes from proton, neutron and nucleon numbers, then comparing isotope composition, nucleon number and nuclear behaviour from data.

Exam points

identify isotopes as nuclei of the same element with the same proton number but different neutron numbers
compare isotope compositions, nucleon numbers or nuclear behaviour from tabulated data

[Maximum number: 2]

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

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

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11.1.4—Isotopes are forms of the same element with different numbers of neutrons in question 1