1 Principles of chemistry
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Atomic structure
Page showing atomic structure of some simple atoms and isotopes.
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Balancing equations
An online balancing equation game.
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Diffusion video
Youtube video, including diffusion of bromine gas.
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Dogs teaching chemistry
Youtube video, this one has dogs teaching chemical bonds.
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It’s elemental balancing act
Quiz for balancing equations.
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Just how small is an atom?
TED video, gives lots of analogies to help you visualise how small atoms are and what is inside them.