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CAIE A-Level Physics 22.4.1 Discrete Atomic Energy Levels

Practise interpreting discrete electron energy levels in isolated atoms and explaining transitions between the allowed levels shown in energy diagrams.

Syllabus
2028–2030
Course
Physics 9702
Level
A2

Exam points

  • explain that isolated atoms have discrete electron energy levels
  • interpret transitions between allowed energy levels

22.4.1—There are discrete electron energy levels in isolated atoms (e.g. atomic question 1

[Maximum number: 3]

Some of the electron energy bands in a solid are illustrated in Fig. 12.1.

Fig. 12.1

Fig. 12.1

In isolated atoms, electron energy levels have discrete values. Suggest why, in a solid, there are energy bands, rather than discrete energy levels.

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