CAIE IGCSE Chemistry 2.3.2 Symbols for Atoms and Ions Questions
Use atomic notation and particle counts to solve atom and ion structure questions.
- Syllabus
- 2026–2028
- Course
- Chemistry 0620
Exam points
- calculate proton, neutron and electron numbers for atoms and ions
- interpret atomic and ionic notation
- identify correct ion formulae and charges
- use atomic structure data to classify particles
CAIE IGCSE Chemistry 2.3.2 Symbols for Atoms and Ions Questions question 1
The atomic number and nucleon number of a potassium atom are shown.
How many protons, neutrons and electrons are in a potassium ion, ?
protons
neutrons
electrons
19
20
18
19
20
20
20
19
18
20
19
19
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