CAIE A-Level Chemistry 1.2.1 Terms: isotope
Practise defining isotopes precisely and comparing named atoms or ions by the protons and neutrons in their nuclei.
- Syllabus
- 2028–2030
- Course
- Chemistry 9701
- Level
- AS
Exam points
- state that isotopes have the same proton number but different neutron numbers
- describe how named isotopes differ by counting neutrons from mass numbers
- compare hydron or halogen isotope nuclei using protons and neutrons
1.2.1—Terms: isotope question 1
[Maximum number: 2]
The model of the nuclear atom was first proposed by Ernest Rutherford. He developed this model on the basis of results obtained from an experiment using gold metal foil.
A sample of gold found in the earth consists of only one isotope.
Explain what is meant by the term isotopes.
M1 (atoms of the same element) with the same proton / atomic number [1]
M2 (but) different number of neutrons/mass number [1]
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