CAIE A-Level Chemistry 1.4.1 First Ionisation Energy
Practise giving the complete molar gas-phase definition of first ionisation energy without omitting the species or electron count.
- Syllabus
- 2028–2030
- Course
- Chemistry 9701
- Level
- AS
Exam points
- state that energy is required to remove one electron from each atom
- specify one mole of gaseous atoms forming one mole of gaseous 1+ ions
- distinguish ionisation from electron affinity, atomisation or removal from a diatomic molecule
1.4.1—Terms: first ionisation energy, IE question 1
[Maximum number: 2]
Define first ionisation energy.
energy required
- when one electron is removed
- from each atom in one mole of
- gaseous atoms
two or three points for one mark, four points for two marks
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