VSEPR Formula: Central Atom

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rikolivares
Posts: 24
Joined: Fri Sep 28, 2018 12:23 am

VSEPR Formula: Central Atom

Postby rikolivares » Thu Nov 29, 2018 12:14 pm

Can you have more than one central atom for the VSEPR formula? Such as A2? If so, why is I3- not A3 or AX2 but X3 instead?

Seohyun Park 1L
Posts: 73
Joined: Fri Sep 28, 2018 12:29 am

Re: VSEPR Formula: Central Atom

Postby Seohyun Park 1L » Thu Nov 29, 2018 2:01 pm

I think VSEPR always considers molecule with one central atom and names the structure based on the number of lone pair electrons and bonded electrons of the central atom. However, I'm not sure about the case for I3.

Nicole Lee 4E
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Joined: Fri Sep 28, 2018 12:16 am
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Re: VSEPR Formula: Central Atom

Postby Nicole Lee 4E » Thu Nov 29, 2018 2:47 pm

You consider one of the iodine atoms the central atom and the VSEPR formula predicts the shape around the central atom. For I3-, the VSEPR formula is AX2E3.

Aiden Atoori 1C
Posts: 67
Joined: Fri Sep 28, 2018 12:24 am

Re: VSEPR Formula: Central Atom

Postby Aiden Atoori 1C » Thu Nov 29, 2018 4:04 pm

Yes, I beleive the central atom can be more than one atom. The text book covers VSEPR formula!

abbydouglas1K
Posts: 65
Joined: Fri Sep 28, 2018 12:26 am

Re: VSEPR Formula: Central Atom

Postby abbydouglas1K » Thu Nov 29, 2018 8:39 pm

For the vsepr model to work you need one central atom and the vsepr shape is determined by the way in which surrounding atoms or lone pair electrons interact with each other around the central atom.


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