Spectroscopy principles written questions
Practise H3 Chemistry molecular-orbital diagrams, LCAO, symmetry and photon transitions, with marking guidance for written scientific reasoning.
Learning goals
- Distinguish atomic and molecular orbitals
- Classify bonding, antibonding and nonbonding orbitals
- Distinguish molecular orbitals with sigma and pi symmetry
- Explain discrete molecular-orbital energy levels
- Apply LCAO to homonuclear diatomic molecules
- Apply LCAO to benzene and linear polyenes
- Construct and interpret diatomic MO diagrams, including HOMO and LUMO
- Construct and interpret pi-MO diagrams for benzene and polyenes
- Relate electromagnetic radiation, photons and E = hf
- Compare electronic, vibrational, rotational and nuclear energy quantisation
- Explain photon absorption and emission as energy-level transitions
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Beyond the syllabus: optional enrichment that does not count towards your progress.