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Chemistry - Chlorine watch

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    Why exactly does chlorine have a RAM of 35.5?

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    Ermm its to do with its isotopes. Theres a calculation that uses its isotopes to work out the relative mass and the average works as that.
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    (Original post by koldtoast)
    Why exactly does chlorine have a RAM of 35.5?

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    cos there is roughly equal amounts of different chlorine isotopes. 35 and 36 i think.
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    (Original post by koldtoast)
    Why exactly does chlorine have a RAM of 35.5?

    GCSE Level.
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    The chlorine 35 isotope is three times more abundant.
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    (Original post by Ralfskini)
    The chlorine 35 isotope is three times more abundant.
    thats it. its 35 and 37 not 36. my mistake.
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    Three times more abundant than what? THe other two isotopes Cl 35 and 37?
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    The RAM is the weighted mean of the isotopes.

    An ordinary sample of naturally occuring chlorine will contain roughly 75% chlorine-35 and 25% chlorine-37.

    So the RAM is (35*0.75)+(37*0.25) = 35.5
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    (Original post by hitchhiker_13)
    The RAM is the weighted mean of the isotopes.

    An ordinary sample of naturally occuring chlorine will contain roughly 75% chlorine-35 and 25% chlorine-37.

    So the RAM is (35*0.75)+(37*0.25) = 35.5
    Oh right I think I get it now thanks
 
 
 

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