Cover of The Mystery of the Electron Shells
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ChemistryBohr's Atomic Model, Electronic Configuration, and Valency

The Mystery of the Electron Shells

By Vaishnavi Renduchintala · Ages 8-15 PDF Book Free

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Tara and Neil explore the Atomic Explorer and learn Bohr’s atomic model — electron shells K, L, M, and N — plus electronic configuration, valence electrons, and how valency helps atoms combine.

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🔬 Science Element

In Bohr’s model, electrons occupy energy levels called shells (K, L, M, N). The maximum electrons in a shell is 2n² (K=2, L=8, M=18, N=32). Electronic configuration shows how many electrons are in each shell. Valence electrons are in the outermost shell; valency is an atom’s combining capacity. Electron arrangement helps explain chemical properties.

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