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IB Chemistry HL 1.3.2 Hydrogen Emission Spectrum Questions

Use hydrogen line positions and convergence to infer electron transitions, compare photon energies, and distinguish ultraviolet from visible lines.

Syllabus
First assessment 2025
Course
Chemistry HL
Level
HL

Exam points

  • Describe the hydrogen line spectrum as evidence of discrete energy levels and relate emitted lines to transitions ending at n=1, n=2 or n=3.
  • Compare hydrogen transition energies, wavelengths and frequencies to assign ultraviolet or visible lines and identify the longest- or least-energy transition.
  • Explain convergence of hydrogen emission lines at higher energies or frequencies and connect line positions with changing level spacing.

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Study 1.3.2—Hydrogen emission spectrum conceptsOpen the corresponding Concept lesson for explanations, examples and exam connections.

IB Chemistry HL 1.3.2 Hydrogen Emission Spectrum Questions question 1

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Magnesium is a group 2 metal which exists as a number of isotopes and forms many compounds.

Explain the convergence of lines in a hydrogen emission spectrum.

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