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Topic: Halogen  (Read 4549 times)

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Offline aqhl

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Halogen
« on: October 18, 2006, 04:37:03 PM »
Hi all, I have a question. Halogen and hydrogen have not more then 2 atom in the molecule, why ?
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Offline Yggdrasil

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Re: Halogen
« Reply #1 on: October 18, 2006, 06:16:17 PM »
Try drawing the Lewis structure of H2 or F2 to see why.
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Offline aqhl

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Re: Halogen
« Reply #2 on: October 24, 2006, 03:52:02 AM »
Yes, I know lewis structures. Can you explain more details why it doesn't have more than 3 atoms in molecule while Oxygen has 3 atoms in molecule
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Offline Dan

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Re: Halogen
« Reply #3 on: October 25, 2006, 07:12:09 PM »
Look up the "octet rule" in your textbook(s)
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Offline DevaDevil

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Re: Halogen
« Reply #4 on: November 03, 2006, 07:54:17 PM »
An Oxygen atom has 2 unpaired electrons in it's uppermost occupied molecular orbitals and will form 2 bonds with it. Halogens have only 1 unpaired electron, hence will form 1 bond. Hydrogen has only 1 electron, hence the single bond.

That's why Oxygen can exist as Ozon, even though the O2 with a double bond between the atoms is more stable. (Ozon has 1 delocalized bond)
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