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    Having trouble with moles, Theory notes is not a probelm, quite understandable but Past papers, no words. Really tough. Any tips ?

    and one multiple question
    if I have a 1 atom X covalent bonded to Y which has 8 electrons/ dots on shells. Will the atom be X3Y or XY3 ? I wrote XY3 but why is it X3Y thats the answer in MS.

    Its Q.8 please check !!! Need opinions on that question ?
    http://papers.xtremepapers.com/CIE/C..._w10_qp_11.pdf
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    Isn't the answer to question 8 a) XY^5, just taking a guess.
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    nop, in markscheme it was X3y !
    and heres the MS http://papers.xtremepapers.com/CIE/C..._w10_ms_11.pdf
 
 
 
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