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: In [[Group 7]] [[Fluorine]] is a [[gas]] at [[Room Temperature|room temperature]] while [[Iodine]] is a [[solid]] at [[Room Temperature|room temperature]] because the [[force]] of [[attraction]] between [[molecule]]s of [[Iodine]] is greater than the [[force]] between [[molecule]]s of [[Fluorine]].
: In [[Group 6]] [[Oxygen]] is a [[gas]] at [[Room Temperature|room temperature]] while [[Sulphur]] is a [[solid]] at [[Room Temperature|room temperature]] because the [[force]] of [[attraction]] between [[molecule]]s of [[Sulphur]] is greater than the [[force]] between [[molecule]]s of [[Oxygen]].
===References===
====AQA====
:[https://www.amazon.co.uk/gp/product/1782945598/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782945598&linkCode=as2&tag=nrjc-21&linkId=ad276ad49df77ab4b40ab4fd0fe10005 ''Intermolecular forces, pages 117, 118, GCSE Combined Science; The Revision Guide, CGP, AQA '']
:[https://www.amazon.co.uk/gp/product/1782945571/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782945571&linkCode=as2&tag=nrjc-21&linkId=9e29fad914244909903e5e93f8a01d162 ''Intermolecular forces, pages 32, 33, GCSE Chemistry; The Revision Guide, CGP, AQA '']
:[https://www.amazon.co.uk/gp/product/0198359381/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=0198359381&linkCode=as2&tag=nrjc-21&linkId=47c8d1ae58d8b3a5e2094cd447154558 ''Intermolecular forces, pages 46-47, 225, GCSE Chemistry; Third Edition, Oxford University Press, AQA '']
:[https://www.amazon.co.uk/gp/product/178294639X/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=178294639X&linkCode=as2&tag=nrjc-21&linkId=51599bb45a2bfaf7c1b6a978b2ca2616 ''Intermolecular forces, pages 83-85, 87, GCSE Combined Science Trilogy; Chemistry, CGP, AQA '']
:[https://www.amazon.co.uk/gp/product/1782945962/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782945962&linkCode=as2&tag=nrjc-21&linkId=476bb5c8d1dfb5c08ac81b6d4d1c98d8 ''Intermolecular forces, pages 85-87, 89, GCSE Chemistry, CGP, AQA '']