This definition of steric number, "the number of electron pairs surrounding
an atom, both bonding and non-bonding", does not make clear that single,
double and triple covalent bonds all contribute a value of only 1 to the
steric number. I found Wikipedia's definition more helpful: "number of
atoms bonded to the central atom of a molecule plus the number of lone
pairs on the central atom".
VSEPR Theory & Molecular Shapes
CHECK OUT MY NEW VIDEO - //youtu.be/Rl6CnZElp4M. Same topic, but a simpler video.This video explains VSEPR Theory & Molecular Shapes.
+Kate Hughes LOL. Chem can be confusing and a difficult class to teach. Kudos to you for seeking additional help. Even my students would use my vids to help clarify a lesson they needed a little extra help on or to review for a test. Best wishes learning and keep up the effort!
+monika patel It is a combination of linear and trigonal planar shapes and so has three different bond angles - 120 degrees between each electron pair in the trigonal planar shape, 180 degrees between both electron pairs in the linear shape (although not linear now it is part of the trigonal bipyramid shape) and 90 degrees between any pair in one of the two shapes and any in the other.
It's unfortunate that this video doesn't cover molecules with lone pairs.
I'm having a bit trouble with those ones. (Like, does the SiF4 has any?
What about the XeO2F2?)
For example, by this analogy, an H2O molecule would normally be linear,
however, the central atom has two lone pairs, which actually makes it a
V-shaped molecule.
Still, it was a very useful video. Good job.
This topic falls within the bonding section of the AQA AS Chem 1 topic. Video covers what the valence shell electron pair repulsion (VSEPR) theory is and how to ...
VSEPR Theory - prediction of how a molecule will look when considering all of its terminal atoms and unbonded pairs of electrons (requires knowledge of Lewis ...
My professor showed it during a lecture. I would like to see the entire series as well.
Introduction to VSEPR Theory (1 of 2)
Video 1 of 2! Mr. Key outlines how we use VSEPR theory to represent molecules in 3D space, beginning with those structures only containing bonded electron ...