Periodic Table (Predicting the Structure and Properties of the Elements)

Start Your Free Trial

What is the electron configuration of krypton?

Expert Answers info

ncchemist eNotes educator | Certified Educator

calendarEducator since 2010

write1,405 answers

starTop subjects are Science, Math, and Social Sciences

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

check Approved by eNotes Editorial

atyourservice | Student

`1s^2 2s^2 2p^6 3s^2 3p^6 3d^10 4s^2 4p^6 `

and the short hand version would be

`[Ar] 3d^10 4s^2 4p^6`

check Approved by eNotes Editorial