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CAIE A-Level Chemistry 23.1.2 First Electron Affinity

Practise defining first electron affinity and explaining Group 16 and 17 trends through attraction, radius and shielding.

Syllabus
2028–2030
Course
Chemistry 9701
Level
A2

Exam points

  • define first EA as the energy change when one mole of gaseous atoms each gains one electron
  • include gaseous state symbols and formation of one mole of gaseous 1− ions in equations
  • explain less exothermic values down a group through greater radius and shielding weakening nuclear attraction

23.1.2—Terms: first electron affinity, EA question 1

[Maximum number: 1]

Potassium chloride, KCl , and magnesium chloride, MgCl2\mathrm{MgCl}_{2}, are both ionic solids.

Table 1.1

Table 1.1

Define the following terms.

first electron affinity

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