CAIE IGCSE Chemistry 2.2.3 Proton Number Atomic Number As the Questions
Use proton, neutron and electron counts to identify elements and describe atoms and ions.
- Syllabus
- 2026–2028
- Course
- Chemistry 0620
Exam points
- identify an element from its atomic structure
- determine proton number, nucleon number and electron number
- distinguish atoms, ions and isotopes using particle counts
- calculate or compare the number of electrons in atoms and molecules
CAIE IGCSE Chemistry 2.2.3 Proton Number Atomic Number As the Questions question 1
The structure of an atom of element X is shown.
key
- = electron
n= neutron
p= proton
What is element X ?
A
boron
B
carbon
C
sodium
D
sulfur
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