• Pharmacy Job Market Webinar

    Are you considering applying to pharmacy school but are concerned about job prospects when you graduate? Join us on Wednesday, July 28th at 8 PM Eastern to hear from three PharmDs about their experiences and options outside of retail pharmacy.

lookleft

Member
10+ Year Member
15+ Year Member
Oct 16, 2003
106
0
Status (Visible)
Does anyone know the difference between geometery and shape.

Thanks
 

Dr_Jay_wannabe

Junior Member
7+ Year Member
15+ Year Member
Dec 4, 2003
23
0
36
South Dakota
Status (Visible)
I believe that GEOMETRY refers to the lewis structure without considering lone pair electrons. SHAPE refers to the three-dimensional structure with lone pair electrons included (all the orbitals). For example, the GEOMETRY of water is bent (because the electrons don't count for the GEOMETRY) and the SHAPE is tetrahedral (electron lone pairs are included).

Hope that helps.

Dr_Jay_Wannabe
 

mynamehere

Full Member
Apr 5, 2010
78
8
Status (Visible)
  1. Pre-Medical
bumping to clarify my confusion . ..

SHAPE = geometry without the effects of electrons?

in one of the kaplan questions, it asks what the SHAPE of SO2 is (providing information that it exhibits dipole-dipole interaction). the answer was BENT.. isn't this the geometry, not the shape?
 

Raisins4Sunday

Full Member
Jun 5, 2012
44
0
Status (Visible)
  1. Pre-Medical
bumping to clarify my confusion . ..

SHAPE = geometry without the effects of electrons?

in one of the kaplan questions, it asks what the SHAPE of SO2 is (providing information that it exhibits dipole-dipole interaction). the answer was BENT.. isn't this the geometry, not the shape?

Yes, that's absolutely right.

Even though the geometry of the SP3 orbitals are all tetrahedral, the shape of the molecule refers to the orientation of the atoms:
CH4 - Tetrahedral
NH3 - Trigonal pyramidal
H2O - Bent

The shape of the molecule will be its geometry when it has no lone pairs.
 
This thread is more than 9 years old.

Your message may be considered spam for the following reasons:

  1. Your new thread title is very short, and likely is unhelpful.
  2. Your reply is very short and likely does not add anything to the thread.
  3. Your reply is very long and likely does not add anything to the thread.
  4. It is very likely that it does not need any further discussion and thus bumping it serves no purpose.
  5. Your message is mostly quotes or spoilers.
  6. Your reply has occurred very quickly after a previous reply and likely does not add anything to the thread.
  7. This thread is locked.