Difference between molecular shape

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

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Amy Luu 2G
Posts: 105
Joined: Wed Sep 18, 2019 12:19 am

Difference between molecular shape

Postby Amy Luu 2G » Thu Nov 14, 2019 12:09 am

What is the difference between trigonal pyramidal and T-shaped? Similarly, what is the difference between seesaw and tetrahedral? I keep choosing one but the answer is actually the other.

Mashkinadze_1D
Posts: 87
Joined: Sat Aug 24, 2019 12:15 am

Re: Difference between molecular shape

Postby Mashkinadze_1D » Thu Nov 14, 2019 12:12 am

A trigonal planar shape has no lone pairs attached to the central atom and a T shaped has two lone pairs attached to the central atom. Similarly, a tetrahedral structure has no lone pairs attached to the central atom, while a seesaw would have one lone pair attached to the central atom. Hope this helps!

Sanjana K - 2F
Posts: 102
Joined: Sat Sep 07, 2019 12:17 am
Been upvoted: 1 time

Re: Difference between molecular shape

Postby Sanjana K - 2F » Thu Nov 14, 2019 3:05 am

Seesaws: 1 LP, seesaw molecular shape, trigonal bipyramidal electron arrangement, bond angles of 90 and 120 degrees
Tetrahedral: 0 LP, tetrahedral molecular shape, tetrahedral electron arrangement, bond angles of 109.5 degrees

Trigonal pyramidal: 1 LP, trigonal pyramidal molecular shape, tetrahedral electron arrangement, bond angles of 109.5 degrees
T-shape: 2 LP, T-shape molecular shape, trigonal bipyramidal electron arrangement, bond angles of 90 and 120 degrees

Sean Cheah 1E
Posts: 105
Joined: Wed Sep 18, 2019 12:20 am

Re: Difference between molecular shape

Postby Sean Cheah 1E » Thu Nov 14, 2019 9:08 am

I found this simple table online that might help you visualize and remember all the various molecular geometries.
Image


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