structure ?

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

Moderators: Chem_Mod, Chem_Admin

nshahwan 1L
Posts: 100
Joined: Fri Aug 30, 2019 12:18 am

structure ?

Postby nshahwan 1L » Thu Nov 14, 2019 11:36 pm

How can you tell if something is linear or not?

Daniel Martinez 1k
Posts: 50
Joined: Wed Sep 18, 2019 12:16 am

Re: structure ?

Postby Daniel Martinez 1k » Thu Nov 14, 2019 11:42 pm

Linear molecular shapes arise when there are 2 bonded pairs. If there are zero, three, or four lone pairs attached to the central atom that already has two bonded pairs, the molecule would have a linear shape.

Jenna Ortiguerra 4G
Posts: 50
Joined: Sat Aug 17, 2019 12:18 am

Re: structure ?

Postby Jenna Ortiguerra 4G » Fri Nov 15, 2019 12:02 am

Molecules with 2 bonded pairs will either form a linear and bent shaped molecule. When the central atom has no lone pairs and has equal bonds between its neighboring atoms that are the same, it will have a linear shape.

Alexandra Bartolome 2H
Posts: 102
Joined: Sat Jul 20, 2019 12:17 am

Re: structure ?

Postby Alexandra Bartolome 2H » Fri Nov 15, 2019 11:12 am

A molecule will have linear structure when the central atom has no lone pairs. This is because the bonding pairs will lie on opposite sides of the central atom to be far apart. Examples are H2O and BeCl2. It helps to draw Lewis structures.

Justin Sarquiz 2F
Posts: 106
Joined: Fri Aug 30, 2019 12:15 am

Re: structure ?

Postby Justin Sarquiz 2F » Fri Nov 15, 2019 11:16 am

Water actually has a bent and not a linear shape because the two lone pairs of electrons sit next to each other rather than on opposite sides. If the two lone pairs are on opposite sides, then water would be nonpolar.

Jaci Glassick 2G
Posts: 104
Joined: Sat Jul 20, 2019 12:16 am

Re: structure ?

Postby Jaci Glassick 2G » Fri Nov 15, 2019 11:17 am

A molecule is linear if it has two bonded atoms and the central atom has no lone pairs. If the central atom has lone pairs, then the molecule will be bent, not linear. Hope this helps!

Sartaj Bal 1J
Posts: 101
Joined: Thu Jul 25, 2019 12:17 am

Re: structure ?

Postby Sartaj Bal 1J » Fri Nov 15, 2019 11:18 am

It can be determined if a molecule has linear shape by looking at the number of bonding and lone pairs on the central atom. For example, molecules with the VSEPR notation of AX2 and AX2E3 both have linear shapes.

Emily Chirila 2E
Posts: 112
Joined: Sat Jul 20, 2019 12:16 am

Re: structure ?

Postby Emily Chirila 2E » Fri Nov 15, 2019 3:18 pm

Sartaj Bal 3H wrote:It can be determined if a molecule has linear shape by looking at the number of bonding and lone pairs on the central atom. For example, molecules with the VSEPR notation of AX2 and AX2E3 both have linear shapes.


AX2E3 is an important one to remember--- even though the central atom has lone pairs it is still linear because their repulsions cancel out.

Junxi Feng 3B
Posts: 52
Joined: Sat Sep 14, 2019 12:17 am

Re: structure ?

Postby Junxi Feng 3B » Fri Nov 15, 2019 3:21 pm

The best way to do that is simply draw out the lewis structure, count the number of surrounding atoms and lone pairs. And then hopefully you can recall what each shape of molecules should be like.


Return to “Determining Molecular Shape (VSEPR)”

Who is online

Users browsing this forum: No registered users and 2 guests