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CAIE A-Level Chemistry 1.4.4 Successive Ionisation Energies

Practise interpreting rising successive values and locating large jumps that reveal electron-shell structure.

Syllabus
2028–2030
Course
Chemistry 9701
Level
AS

Exam points

  • explain the general rise as each electron is removed from an increasingly positive and smaller ion
  • identify a large jump when the next electron is removed from a lower shell with less shielding
  • use the number removed before the large jump to infer the number of valence electrons and likely group

1.4.4—The variation in successive ionisation question 1

[Maximum number: 2]

Nitrogen and phosphorus are elements in Group 15 of the Periodic Table.

Fig. 3.1 shows a sketch of some of the ionisation energies of phosphorus, P.

Fig. 3.1

Fig. 3.1

Complete the graph in Fig. 3.1 to show the third to sixth ionisation energies of P.

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