CAIE IGCSE Physics 5.1.2.5 What Is Meant By an Isotope and State Questions
Learn how isotopes share proton number but differ in neutron number.
- Syllabus
- 2026–2028
- Course
- Physics 0625
Exam points
- define isotopes as atoms of the same element with different neutron numbers
- compare isotope nuclei using proton and neutron composition
- explain which atomic properties remain the same or differ between isotopes
CAIE IGCSE Physics 5.1.2.5 What Is Meant By an Isotope and State Questions question 1
[Maximum number: 1]
Many household smoke alarms contain a sample of the radioactive isotope americium-241 (Am).
Americium-241 is the isotope of the element americium that has the nucleon number (mass number) 241.
State how the composition of a nucleus of americium-241 differs from that of a nucleus of americium-242.
(americium-241 has) one neutron fewer (in the nucleus)
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