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Atomic Structure and Writing Formulae - BBC Bitesize
Atoms are made up of three smaller particles called protons, electrons and neutrons.
↗ https://www.bbc.co.uk/bitesize/topics/z242m39/articles/z4mx7ycAtoms are made up of three smaller particles called protons, electrons and neutrons.
↗ https://www.bbc.co.uk/bitesize/topics/z242m39/articles/z4mx7yc