Chemistry

posted by .

Which is not a ground state electron configuration?
A. 1s2
B. 1s2 2p1
C. 1s2 2s2
D. 1s2 2s2 2p1

  • Chemistry -

    Neon has a configuration of:
    1s2 2s2 2p6

    So do you find one of the choices have electrons that are out of place?

  • Chemistry -

    Yes 1s2 2s2 2p1,I am right?

  • Chemistry -

    Electrons are filled in order of the orbitals such that there is least energy, or the ground state.

    The first to be filled are:
    1s2 2s2 2p6 (configuration for neon).

    If they are filled out of order, it will be in the excited state (not ground state).

    So for
    H 1s1
    He 1s2
    Li 1s2 2s1
    Be 1s2 2s2
    B 1s2 2s2 2p1
    ...
    Ne 1s2 2s2 2p6

    So can you now find one of the choices where the orbitals are filled "out of turn", or not in the ground state?

    To help you understand, and as a reference, you can look at:
    http://www.mikeblaber.org/oldwine/chm1045/notes/Struct/EPeriod/Struct09.htm

  • Chemistry -

    1s2 2p1 is that right? Thank you so much!

  • Chemistry -

    I know that 1s2 2s2 2p1 is the excited state of 1s2 2s2 but then 1s2 2p1 its orbital are filled out of turn. So I am kinda confused about it because you said that if its excited state then that means its not ground state and if the orbitals are filled out of turn then that's not in the ground state too. So does it mean that b and d are both not in ground state?

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. science-chem question

    Hello I have another hybridization question. For example in BeF2 ... the electron configuration is 1s2, 2s2, 2p1. It gets hybridized to 1s2, 2s1, 2p2. I know that it will be a sp2 hybridization but I'm not exactly sure why. It's because …
  2. Chemistry

    Use these answers for questions 4 - 7. (A) 1s2 2s22p5 3s23p5 (B) 1s2 2s22p6 3s23p6 (C) 1s2 2s22p62d10 3s23p6 (D) 1s2 2s22p6 3s23p63d5 (E) 1s2 2s22p6 3s23p63d3 4s2 4. An impossible electronic configuration 5. The ground-state configuration …
  3. CHEM

    Confirm that the experimentally observed electronic configuration of K, 1s2 2s2 2p6 3s2 3p6 4s1 is energetically more stable than the configuration 1s2 2s2 2p6 3s2 3p6 3d1. ______ i know that it is energetically favorable for the electron …
  4. Chemistry

    Which is not a ground state electron configuration?
  5. college Chemistry

    Which is not a ground state electron configuration?
  6. Chemistry

    Which is not a ground state electron configuration?
  7. Chemistry

    Which is not a ground state electron configuration?
  8. Chemistry

    Which is not a ground state electron configuration?
  9. AP Chemistry

    Which of the following electron configurations correspond to an excited state?
  10. chem

    If you maximize the unshared electrons in the boron atom, the electron configuration is?

More Similar Questions