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    GUYS!!! PLS SHARE YOUR ANSWERS!!! WHATEVER YOU REMEMBER....
    I can't find any threads with answers

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    Here's the link to another thread with the unofficial mark scheme: http://www.thestudentroom.co.uk/show....php?t=4167189
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    (Original post by jannet5321)
    Here's the link to another thread with the unofficial mark scheme: http://www.thestudentroom.co.uk/show....php?t=4167189
    no that's igcse. I think OP (like myself) wants regular gcse
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    Yes please! Edexcel; Discovering Chemistry (C2) unofficial mark scheme???
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    (Original post by graceemead)
    Yes please! Edexcel; Discovering Chemistry (C2) unofficial mark scheme???
    no one's made one and i can't remember the questions!
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    i remember a question asking about the relative mass of an electron or something, and i got 1/1836
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    For the electron question, I put 1/1858. Would I get the mark, or does it specifically have to be the exact number?
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    I put the mass as 1/1840. That should be right.
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    Sodium- Yellow Flame
    Barium Meal is safe despite being toxic because Barium is insoluble and therefore does not reach the bloodstream, etc.
    Dot and Cross diagram had 3 'Cl' circles joined to a 'P'. Each Cl shared one electron with the 'P' and you had to make sure each element had a full outer shell in the end.
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    Name:  pcl3.gif
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    2Al + 3Cl2 -----> 2AlCl
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    CaCO3 + HCl --> CaCl2 + CO2 + H2O
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    (Original post by macher-kriss)
    2Al + 3Cl2 -----> 2AlCl
    Al + cl(3) = alcl3
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    (Original post by macher-kriss)
    Name:  pcl3.gif
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    did you have to put the outer electrons as well? i only put the bonds in
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    Emmanuel Emmemue
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    2Al + 3Cl2 = 2AlCl3
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    (Original post by iKiss.)
    did you have to put the outer electrons as well? i only put the bonds in
    You do- thats the main reason for dot and cross diagrams unfortunately
 
 
 
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