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general chem questions

Discussion in 'DAT Discussions' started by issa, Jul 20, 2006.

  1. issa

    issa Senior Member
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    Circle g.s. [ground state]; e.s. [excited state]; or i [incorrect]


    Which one of these in the excited state and why?
     

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  3. dying2badentist

    dying2badentist Junior Member
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    e
     
  4. tom_servo_dds

    tom_servo_dds Senior Member
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    a) i - no 1s3
    b) g
    c) i - two problems
    d) g
    e) e - not the correct filling order
    f) i - should fill all d subshells first
     
  5. whiskeysour

    whiskeysour up'n the competition
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    wrong, it is the correct filling order.
     
  6. tom_servo_dds

    tom_servo_dds Senior Member
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    Shouldn't it finish the 2p before beginning the 3s?
     
  7. issa

    issa Senior Member
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    P has a 5 not 6 in part e. is e in the excited state or not? and anyone have the correct explanation?
     
  8. JohnDoeDDS

    JohnDoeDDS Senior Member
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    C is correct abd still have the ground state. E is the excited state
     
  9. Pdiddy310

    Pdiddy310 Med School 4.0
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    the magnetic spin in C is incorrect.
     
  10. tom_servo_dds

    tom_servo_dds Senior Member
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    What is the answer?
     
  11. Envision

    Envision Envisioning...
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    A is incorrect, (1s3?)
    I believe bd are all in gs
    im not sure about c, but arent all the lone electrons suppose to be moving in one direction? thus the paramagnetism when they are unpaired. in this case, since the electron in the 2py and 2pz orbitals are facing opposite directions, it would cancel each other out (diamagnetism). so i think this is Incorrect.
    e is excited, moving from 2p to 3s (higher energy level)
    I would say F is incorrect bc i see a 2D subshell, which, unless im mistaken does not exist.
     
  12. joonkimdds

    joonkimdds Senior Member
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    I think only B and D are correct. All the others have at least 1 or 2 problems.
    B has n=2, D has n=3. Excited state is anything beside n=1 or ground state so I think both B and D should be the answers.

    Therefore, there is no ground state, B and D are excited state, and all the others are incorrect. I bet I am 100 % correct :)
     
  13. Siubking

    Siubking Member
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    You got an A in general chemistry?
     
  14. joonkimdds

    joonkimdds Senior Member
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    yes :love: :laugh: :smuggrin:
     
  15. creestoL

    creestoL Junior Member
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    Can you please explain why e is incorrect? also, n=2, n=3...that refers to the electron shell right? how did you determine it was 2 and 3? thanx. also, if the OP can post the answers, that would be helpful.
     
  16. Envision

    Envision Envisioning...
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    2 and 3 corresponds to the principal quantum number which can be determined by the electronic configuration. What i didnt know was that anything above n=1 was excited. can you please explain this? and also, why is e incorrect, the electron configuration follows all the rules and the filling of the higher energy orbital first indicates excitation. thanx in advance.
     
  17. joonkimdds

    joonkimdds Senior Member
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    E is incorrect because of 2d
    here is the order it is supposed to be
    1s2
    2s2
    2p6
    3s2
    3p6
    4s2
    3d( )
    4p6

    2d doesn't exist.
    Kaplan blue book says it doesn't matter if u state 4p before 3d or vice versa.
    but anyway, 2d doesn't exist. d starts from 3d.

    and if you want more explanation, u should be clear about what's the answer and what's not. because even if i say this, there is no guarantee i am 100% right and i can make things worse if i keep insisting that my wrong answer is correct, if u know what i am saying...

    plz tell me what the answer is.
     
  18. issa

    issa Senior Member
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    i don't have the answers for these questions. is e in excited mode or what?
     
  19. aranjuez

    aranjuez Member
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    f cannot occur as there is no such thing as 2d. There are only 2s and 2p. Remember the order of filling: 1s, 2s, 2p, 3s, 3p, 4s, 3d, 4p, 5s, etc.

    s gets 2, p gets 6, d gets 10, and so on.

    f is not an excited state. It's an impossible "state" per the rules.

    aranjuez

    NOTE: editted after it was brought to my attention that my explanation was regarding (f) and not (e). My mistake. Corrected.
     
  20. joonkimdds

    joonkimdds Senior Member
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    Yay~ so i was correct!
    Community College Rules!
    Woo HOo~~!
     
  21. issa

    issa Senior Member
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    you are talking about f not e. f is incorrect. can you give me an example of an excited state configuartion?
     
  22. issa

    issa Senior Member
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    lol, but you are wrong regarding question e. e doesn't have 2d, and e needs to fill its 3rd orbital. take a look at the question again and see for yourself. your explanation is correct for question f.
     
  23. aranjuez

    aranjuez Member
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    Wupps! Sorry about that. You're right. It was for f.

    aranjuez
     
  24. joonkimdds

    joonkimdds Senior Member
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    same here~ lol but it's becuz u linked the photo so whenever i click it the entire window goes to that link and i have to press back and so on.

    if i quote the problem, there wasn't this mistake :laugh:

    anyway, I still believe that anything beside n=1 is excited state becuz n=1 is called ground state.

    at least that's what i read from the book.
     
  25. dat_student

    dat_student Junior Member
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    e is the correct answer without a doubt :)

    Ground state:
    1s2 2s2 2p6 3s1

    Excited state:
    1s2 2s2 2p5 3s2
    (one of the electrons in one of the p suborbitals is excited and moved to the next shell (i.e. shell #3, orbital S))
     
  26. Envision

    Envision Envisioning...
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    You still havent answered my question regarding e, i know f doesnt make sense bc of 2d orbital. however, why would e be incorrect? i believe e is in its excited state and its filling of its orbital follows every chemical rule. in fact, bc there is a electron moved into a higher energy state leads me to believe it is in its excited state.
     
  27. Envision

    Envision Envisioning...
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    i agree. DAT student, what about b and d? i was under the impression that they are in gs. what do you think?
     
  28. R.L.H

    R.L.H LoVe mY liFE
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    I agree, B & D are 100% gs. The answer is E.
     
  29. dat_student

    dat_student Junior Member
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    yes, b & d >> ground state :)
     

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