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anonymous

  • one year ago

The electron configuration 1s^2 2s^2 2p^6 3s^2 3p^6 represents which noble gas? neon argon helium krypton

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  1. Photon336
    • one year ago
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    @tomie2020 count the number of electrons in the superscript \[1s ^{2} \] the 2 on top tells you that there are 2 electrons.

  2. anonymous
    • one year ago
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    so 18 electrons

  3. Photon336
    • one year ago
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    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

  4. anonymous
    • one year ago
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    seriously its that easy???? i feel dumb now but thanks so much for the help

  5. Photon336
    • one year ago
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    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.

  6. anonymous
    • one year ago
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    it was argon

  7. Photon336
    • one year ago
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    yep

  8. Photon336
    • one year ago
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    Noble gases are important because they all have 8 valence electrons.

  9. Photon336
    • one year ago
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    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|

  10. Photon336
    • one year ago
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    hope this helped you

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