Geometry vs molecular shape

(Polar molecules, Non-polar molecules, etc.)

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MedhaVallurupalli1F
Posts: 30
Joined: Wed Feb 27, 2019 12:15 am

Geometry vs molecular shape

Postby MedhaVallurupalli1F » Sun Jul 28, 2019 10:09 am

What is the difference between geometry vs molecular shape?

Kevin To 1B
Posts: 32
Joined: Sat Feb 02, 2019 12:15 am

Re: Geometry vs molecular shape

Postby Kevin To 1B » Sun Jul 28, 2019 10:50 am

Geometry refers to the arrangement of elections, including both bond and lone pair electrons. On the other hand, shape only refers to the bond electrons. For example, NH3 (ammonia) has 4 regions of electron density (1 lone pair and 3 [single] bonds [to the hydrogens]). The geometry of ammonia would be tetrahedral but the shape (which does not include the lone pair) would be trigonal pyramidal.

Haorui Li 1A
Posts: 30
Joined: Mon Jun 17, 2019 7:23 am

Re: Geometry vs molecular shape

Postby Haorui Li 1A » Sun Jul 28, 2019 8:22 pm

When no lone pairs of electrons are present, the electronic geometry is the same as the molecular shape. Things are different when a lone pair is presented. Different molecules with the same geometry shape can have different molecular shapes depend on the number of their lone pairs.

Daniel Kim 1D
Posts: 38
Joined: Wed Oct 03, 2018 12:17 am

Re: Geometry vs molecular shape

Postby Daniel Kim 1D » Sun Jul 28, 2019 9:13 pm

When there are no lone pairs they are the same. When there is a lone pair, the geometry takes account of only the elctron densities and the molecuar shape takes account for the lone pairs.

Sisi Li 1F
Posts: 34
Joined: Mon Mar 11, 2019 12:15 am

Re: Geometry vs molecular shape

Postby Sisi Li 1F » Sun Jul 28, 2019 10:08 pm

Molecular shape only considers the bonding pairs of a molecule. When there are lone pairs, you look at the geometry, or electron arrangement.

Radha Patel 4I
Posts: 68
Joined: Tue Feb 12, 2019 12:15 am

Re: Geometry vs molecular shape

Postby Radha Patel 4I » Sun Jul 28, 2019 11:07 pm

Molecular Geometry : bonds

Electronic Geometry/ arrangement : Bonds and lone pairs

bloodorangefield
Posts: 24
Joined: Wed Sep 18, 2019 12:19 am

Re: Geometry vs molecular shape

Postby bloodorangefield » Fri Oct 04, 2019 12:54 pm

Geometry means how both bond electrons and lone pairs are arranged, whereas shape only refers to the arrangement of the bond electrons.


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