anonymous
  • anonymous
The electron configuration 1s^2 2s^2 2p^6 3s^2 3p^6 represents which noble gas? neon argon helium krypton
Chemistry
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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Photon336
  • Photon336
@tomie2020 count the number of electrons in the superscript \[1s ^{2} \] the 2 on top tells you that there are 2 electrons.
anonymous
  • anonymous
so 18 electrons
Photon336
  • Photon336
Now @tomie2020 that you have this number, 18 electrons all you need to do is go back to the periodic table and find what element has 18 electrons

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anonymous
  • anonymous
seriously its that easy???? i feel dumb now but thanks so much for the help
Photon336
  • Photon336
yeah so what noble gas would it be @tomie2020 ? and also they gave you the electronic configuration, in the future you may have to find out the electronic configuration is that's a little bit harder though. you need to follow hunds rule, pauli's exclusion principle, and afbau principles.
anonymous
  • anonymous
it was argon
Photon336
  • Photon336
yep
Photon336
  • Photon336
Noble gases are important because they all have 8 valence electrons.
Photon336
  • Photon336
that means that they are un-reactive and stable generally, yet sometimes fluorine will react with them though, there are some exceptions to this look at this compound Xenon a noble gas Xenon hexa-flouride |dw:1444150083226:dw|
Photon336
  • Photon336
hope this helped you

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