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    (Original post by Fabolous)
    Can anyone help me out with electron confirgiration of d block elements ie Ti is 1s2 2s2 2p6 3s2 2p6 4s2 3d2 - why not 4d2?

    please quote me when replying
    HI
    It goes in the order S(2electrons) P(6electrons) D(10electrons) F(im not sure)
    1s2
    2s2 2p6
    3s2 3p6 3d10
    4s2 4p6 4d10 4f etc..
    BUT THE ONLY THING you have to remembere is that 4s2 before 3d10, therefore before u can fill 3d10 YOUR 4s2 has to be complete!
    then the order goes back to normal and anway they dont ask elements having more than 4p6

    Hope u understand, if u didn't JUST BY HEART patter
    Good Luck
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    is it 3d6 or 3d2? could anyone please help with why does theoretical and practical lattice energies have a difference? thanks!
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    (Original post by khz)
    HI
    It goes in the order S(2electrons) P(6electrons) D(10electrons) F(im not sure)
    1s2
    2s2 2p6
    3s2 3p6 3d10
    4s2 4p6 4d10 4f etc..
    BUT THE ONLY THING you have to remembere is that 4s2 before 3d10, therefore before u can fill 3d10 YOUR 4s2 has to be complete!
    then the order goes back to normal and anway they dont ask elements having more than 4p6

    Hope u understand, if u didn't JUST BY HEART patter
    Good Luck
    Ah okay so for example Co will be 1s2 2s2 2p6 3s2 3p6 4s2 3d7 right?

    and for Ti 1s2 2s2 2p6 3s2 3p6 4s2 3d2 ?

    I also need help with 'showing' silver fluoride lattice with charges - what will be their charges?
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    (Original post by Nellie13)
    hey have you also got a linkfor OCR CHEMISTRY UNIT 2 F322 JUNE 2010???
    i neeed it!!!
    It'll be in june 2010 if you check
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    (Original post by sophie888)
    is it 3d6 or 3d2? could anyone please help with why does theoretical and practical lattice energies have a difference? thanks!
    Its 3d2
    theoretical and pratical lattices have a difference cos the compound is not 100% ionice and shows some covalent character as well thus its lower than the the theoretical value
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    (Original post by Fabolous)
    Ah okay so for example Co will be 1s2 2s2 2p6 3s2 3p6 4s2 3d7 right?

    and for Ti 1s2 2s2 2p6 3s2 3p6 4s2 3d2 ?

    I also need help with 'showing' silver fluoride lattice with charges - what will be their charges?
    Yupp correct!
    Its the same as silver chloride
    u know the lattice diagram? Its that! Just put F instead of Cl
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    Does anyone have the June 2010 unit 1 chemistry (edexcel) ?
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    (Original post by Joseph46)
    Does anyone have the June 2010 unit 1 chemistry (edexcel) ?
    I do. I must say, I'm rather looking forward to the summer retakes...
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    Hi! I have my chem uni 1 as level exam 2morrow morning..can ny 1 plzz provide me with a link 4 june2010 mark scheme..as soon as possible plzzz..!!
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    (Original post by amar24)
    Hi! I have my chem uni 1 as level exam 2morrow morning..can ny 1 plzz provide me with a link 4 june2010 mark scheme..as soon as possible plzzz..!!
    http://www.thestudentroom.co.uk/show....php?t=1502355
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    how did everyone find it?
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    (Original post by otrivine)
    how did everyone find it?
    It wasn't that easy for me Moreover it was lenghthy!!
    How was it for you all?
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    lengthy*
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    how did some people find it
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    (Original post by otrivine)
    how did some people find it
    Your inbox has been idsabled but as for you question, i dont realluy know if' u'll lose marks for it
    Just for teh record, which country are u giving it from?
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    Hows the prep coming along for Unit 2?
    Anybody giving Unit this Wednesday?
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    Hows the prep coming along for Unit 2?
    Anybody giving Unit 6 this Wednesday? *
 
 
 
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