Chemistry · Foundation

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Valence electronsRunning
Atom builder. Valence electrons at 13 e⁻. Core + valence 23 e⁻, Total electrons 17 e⁻. Currently core + valence is over by 6 e⁻.TUNING
t = 0.0s

Core + valence

23e⁻

Total electrons

17e⁻

Core + valence is over by 6 e⁻

13 e⁻

Atom builder. Valence electrons at 13 e⁻. Core + valence 23 e⁻, Total electrons 17 e⁻. Currently core + valence is over by 6 e⁻.

What has to balancev=Z−ecorev = Z - e_{core}

What is happening

You arrive at a materials lab predicting how a salt will bond.

The bonding prediction keeps failing. The sample is chlorine — 17 electrons total, 10 locked in inner shells — and the outer-shell count is wrong.