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    [QUOTE=Bloom77;65218653]Does second ionisation energy follow the same trend as first ionisation energy for period 3 apart from sodium?







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    has anyone posted a link to specimen paper 1 (set 2)?
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    [QUOTE=Bloom77;65219227]
    (Original post by Bloom77)
    Does second ionisation energy follow the same trend as first ionisation energy for period 3 apart from sodium?
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    It's the same trends just shifted to the right so the elements that don't follow the trends will be in group 3 and 7 at the second I.E
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    (Original post by sameer99)
    has anyone posted a link to specimen paper 1 (set 2)?
    no - i dont know why to be honest
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    (Original post by rosemondtan)
    is mass spec on the paper tomorrow?
    yh it is i seen a leaked version of the paper!! how would we know it not like we made the paper madam
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    Help please
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    (Original post by Why-_-Study-_-)
    Has any got a link to the chem specimen set 2 papers - i need a digital copy fast - please anyone
    http://www.thestudentroom.co.uk/show...rimary_content
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    thank you
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    (Original post by Bloom77)
    Help please
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    I think it would be the second ionisation energy because Tl has the configuration [Xe]6s^2 5d^10 6p^1

    Youve removed from 6p, one electron, then you are removing fron 6s anothed electron, so it would be the 2nd ionisation energy. Remember that electrons are removed from the highest number first then in order of p, s, d.
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    (Original post by Turtlebunny)
    I think it would be the second ionisation energy because Tl has the configuration [Xe]6s^2 5d^10 6p^1

    Youve removed from 6p, one electron, then you are removing fron 6s anothed electron, so it would be the 2nd ionisation energy. Remember that electrons are removed from the highest number first then in order of p, s, d.
    Ooh thank you makes sense
    But how do you know Tl has an electron configuration of [Xe]6s^2 5d^10
    Xe has 54 electrons
    And Tl has 81
    .???


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    Guys, are there any values like constants which we will have to remember?
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    Which practicals are coming up in this paper? I saw it somewhere here but cant find it
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    (Original post by rosemondtan)
    is mass spec on the paper tomorrow?
    yes it is
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    (Original post by Zakria123)
    Which practicals are coming up in this paper? I saw it somewhere here but cant find it
    1. Titration
    2. Measuring enthalpy changes
    3. group 2, group 7, halides

    good luck for tomorrow
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    (Original post by sameer99)
    yes it is
    wit isn't mass spec under organic analysis and thus under paper 2?
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    thanks mate, you're a life saver!
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    (Original post by rosemondtan)
    wit isn't mass spec under organic analysis and thus under paper 2?
    thats true but TOF mass spec is in the first chapter also, atomic structure, and this chapter is on paper 1
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    just remember the stages and what the graphs for relative abundance show
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    Can anybody help me with the time of flight equation? Don't understand how you do the calculations for it
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    to calculate relative atomic mass of, e.g. magnesium;

    "graph of mass spectrum, % abundance y-axis mass/charge x-axis"

    79% of 24 mass/charge
    10% of 25 mass/charge
    11% of 26 mass/charge

    Step 1:

    total mass of 1st isotope: 79x24=1896
    total mass of 2nd isotope: 10x25=250
    total mass of 3rd isotope: 11x26=286

    Step 2:

    1896+250+286=2432

    Step 3:

    (79+10+11=100) therefore;

    2432/100 = 24.32

    therefore Ar of Magnesium=24.3 (3 s.f.)

    i hope this helps

    good luck for tomorrow

    (Original post by simranjohalx)
    Can anybody help me with the time of flight equation? Don't understand how you do the calculations for it
 
 
 
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