Posted: Tue Jun 12, 2018 11:35 pm
After the review session today I have come to learn that I am more confused about shapes than i thought i was. For starters, I understand the linear shape and I understand that when there is a lone pair the bond angle is less than 180. However, when it comes to the bent shape and the trigonal planar I run into confusion. For instance at the review session, the VSEPR Model was drawn as a linear shape, but then the central atom was said to have a lone pair on it and due to the fact taht the electron cloud of the lone pair is so big that it pushes the bond atoms down and creates a bent shape. It was further discussed that the shape actually was not bent because the lone pair that was added made it a trigonal planar. So i guess my confusion is, do lone pairs on a linear model make a bent shape? and does the bent shape with a lone pair on the central atom make the shape a trigonal planar? Also, can someone explain how to tell the difference between a tetrahedral, a see-saw, and a square planar? Thank you and i am so sorry that was so long and probably confusing!