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    (Original post by Zishi)


    I think if you read the statement carefully you'll understand...

    It says that the volume is GREATER then it WOULD have been had if dissociation had taken place.

    Which is basically what you are saying (correctly).
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    (Original post by charco)
    I think if you read the statement carefully you'll understand...

    It says that the volume is GREATER then it WOULD have been had if dissociation had taken place.

    Which is basically what you are saying (correctly).
    Oops, sorry! I think I didn't understand it.

    And what about the first question?
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    (Original post by Zishi)
    Oops, sorry! I think I didn't understand it.

    And what about the first question?
    increase in first ionisation energy => decrease in atomic radius, up a group(usually) hence decrease in mass number => rules out C and D

    if i have to choose, i'd say A. As you might know that no of neutrons/no of protons roughly equal 1 for early elements and this ratio goes higher up towards heavier elements. hence as atomic number increases, mass number increases much more down a group.(work by Henry Moseley)
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    (Original post by shengoc)
    increase in first ionisation energy => decrease in atomic radius, up a group(usually) hence decrease in mass number => rules out C and D

    if i have to choose, i'd say A. As you might know that no of neutrons/no of protons roughly equal 1 for early elements and this ratio goes higher up towards heavier elements. hence as atomic number increases, mass number increases much more down a group.(work by Henry Moseley)
    Oh, sorry! I MISREAD the question.
 
 
 
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Updated: April 1, 2011
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