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What is the electron configuration of krypton?

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arsenals | Student | eNoter

Posted November 3, 2012 at 11:00 PM via web

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What is the electron configuration of krypton?

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ncchemist | eNotes Employee

Posted November 4, 2012 at 4:59 PM (Answer #1)

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Krypton is a group 18 noble gas.  As such, it has a stable octet in its valence shell and is extremetly unreactive.  Its electron configuration is shown below:

1s2, 2s2, 2p6, 3s2, 3p6, 3d10, 4s2, 4p6

This totals up to 36 electrons, which is the atomic number of krypton.  The 4s2 and 4p6 electrons are the valence shell octet.  The electron configuration can be shorthanded using argon as shown below:

[Ar] 3d10, 4s2, 4p6

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