(eli5) Why is the electron configuration of tin 2, 8, 18, 18, 4 and not 2,8,18,30,2 ?

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What is the rule for electron configuration, i do not understand it. Also isn’t the maximum number of electrons in shell 4, 32?

In: Chemistry

3 Answers

Anonymous 0 Comments

Shells 4 and 5 actually overlap in their energy requirements. An electron always falls into the least energetic slot that’s open.

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