Sources used for ‘Atomic models: Old ideas and what we think the atom looks like now’

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• THOMSON, J. J. (1904) On the Structure of the Atom: an Investigation of the Stability and Periods of Oscillation of a number of Corpuscles arranged at equal intervals around the Circumference of a Circle; with Application of the Results to the Theory of Atomic Structure. Philosophical Magazine. 7 (39) p 237-265 Available from: https://www.chemteam.info/Chem-History/Thomson-Structure-Atom.html
• WIKIPEDIA (2023) Abegg’s rule [Online] Available from: https://en.wikipedia.org/wiki/Abegg%27s_rule
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• WIKIPEDIA (2025) Subatomic particle [Online] Available from: https://en.wikipedia.org/wiki/Subatomic_particle

All images used were illustrated by Natalie Peirce.