CAIE IGCSE Physics 5.1.2.3 Terms Proton Number Atomic Number Z Questions
Learn to read nuclide symbols and determine proton, neutron and electron composition.
- Syllabus
- 2026–2028
- Course
- Physics 0625
Exam points
- interpret proton number and nucleon number in nuclide notation
- calculate numbers of protons, neutrons and electrons in atoms and nuclei
- compare isotope composition using proton and neutron counts
CAIE IGCSE Physics 5.1.2.3 Terms Proton Number Atomic Number Z Questions question 1
[Maximum number: 2]
The isotope uranium-235 is represented by
92235∪.
State what the numbers 92 and 235 represent in this symbol.
92 is
235 is
(92 is) the proton number / number of protons (in the nucleus) / atomic number
(235 is) the nucleon number / number of nucleons (in the nucleus) / mass number
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