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IB Chemistry SL 1.3.1 Emission Spectra Questions

Connect emitted photons with electron transitions, distinguish line and continuous spectra, and compare wavelength, frequency and energy across the electromagnetic spectrum.

Syllabus
First assessment 2025
Course
Chemistry SL
Level
SL

Exam points

  • Explain how excited electrons produce emission lines and distinguish emission, absorption, line and continuous spectra.
  • Relate wavelength, frequency and photon energy, then classify radiation across the electromagnetic spectrum.
  • Use emission colours and spectral lines to identify elements or explain observed colours in flames and astronomical spectra.

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Study 1.3.1—Emission spectra conceptsOpen the corresponding Concept lesson for explanations, examples and exam connections.

IB Chemistry SL 1.3.1 Emission Spectra Questions question 1

[Maximum number: 2]

Lithium and boron are elements in period 2 of the periodic table. Lithium occurs in group 1 (the alkali metals) and boron occurs in group 3. Isotopes exist for both elements.

Every element has its own unique line emission spectrum.

Distinguish between a continuous spectrum and a line spectrum.

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