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Chapter 9: Structure of the Atom
— Everything you have ever touched is made of atoms. Let's go inside. —
Why this matters
(I once asked a class, "If I could shrink you down to the size of an atom, what would you see?" One student said, "Nothing — just empty space." And she was almost right. An atom is mostly empty space, with a tiny, incredibly dense nucleus at the centre and electrons whizzing around far away. The distance between the nucleus and the electrons is proportionally larger than
