1.1 - The atom
	1.11 - Structure of the atom
	1.12 - Relative mass and charge
	1.13 - AZE
	1.14 - Isotopes
1.2 - The mass spectrometer
	1.21 - The Mass Spectrometer instrument
	1.22 - MS - Relative mass determination
	1.23 - Other applications of MS
1.3 - Electron arrangement
	1.31 - The electromagnetic spectrum
	1.32 - Continuous and line spectra
	1.33 - The hydrogen spectrum
	1.34 - Electronic configuration
	1.35 - The Aufbau principle
	1.36 - Evidence for energy levels in atoms