What are "electron shells"?

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Offline natalieee

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What are "electron shells"?
« on: 16/09/2008 10:53:51 »
um so i need some help for chemistry as my teacher is away all week. PLEASE if you can help me as i also have a test on thursday.

who can explain electron shells to me?
also ions and the ionic compound forming method?

and is the ion for ammonia NH4 r NH3
(the 4 and 3 being little under the H)

thank you.
« Last Edit: 06/10/2008 22:56:23 by chris »



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Re: What are "electron shells"?
« Reply #1 on: 16/09/2008 14:07:51 »
The whole business of electron shells is too big to explain here but should be accessible in any basic textbook or you could Google it - though I couldn't find anything suitable.

Bubble ammonia (NH3) through water (H2O) and you'll get some ammonium hydroxide - that is, two ions, ammonium and hydroxyl, though the latter will have a water molecule bonded to make it a hydroxonium ion (H3O+)

NH3 + H2O → NH4+ + OH-
« Last Edit: 16/09/2008 14:21:59 by blakestyger »


Offline Bored chemist

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Re: What are "electron shells"?
« Reply #2 on: 16/09/2008 21:52:45 »
That reaction goes in the oposite direction. Ammonium hydroxide has no real existence; it would instantly decompose to ammonia and water.
Ammonia is NH3
The ammonium ion is NH4+
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