Hess law[1], start, good demo of energy levels
Power pt on shapes and molecules1
Electron configurations (1)
Ionisationgroups[1]
Ppt ionic formulae
P pt ionic formulae
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![Ionisationgroups[1]](https://static.fdocuments.net/doc/330x215/55c429d4bb61eb2e038b45e8/ionisationgroups1.jpg)
