1.1 Atomic structure: Review
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Mass Spectrometer		Mass spectroscopy and Ar calculations	Orbits to orbitals (background)
Line emission spectra		Ionisation energies and shells	Line emission spectra (background)
Electron shells to levels		Shells, levels and orbitals	Interactive electron configuration and the Periodic table
Successive ionisation energies (same atom)		Atomic structure review
Ionisation energies down a Group
Ionisation energies across a Period