Hon Chemistry 2-17-17 Resonance & Polyatomic Ions & Molecular Geometry

HON CHEMISTRY: Who knew we’d be doing geometry in chemistry?!? You did a great job today! Lewis structures, multiple bonds, resonance, and now polyatomic ions and molecular geometry – wow, that’s a lot you’ve conquered in the last few days! One important thing I forgot to tell you! There are only a few elements that can have a multiple bond. They are carbon, oxygen, nitrogen and sulfur – CONS. No other atoms can, so if there is ever a need for a multiple bond but you can’t have one, the compound would be an exception to the octet rule!

Molecular geometry is super easy. Make sure you know how to draw Lewis structures, then determine the type of ABE structure and you’ve got it. Here’s a copy of Molecular Geometry Shapes – VSEPR handout. Be sure and memorize the shape and the ABE structure that goes with it. Easy-peazy!

Here’s some good advice – don’t take shortcuts. Learn the proper steps on the easier molecules, and you’ll be able to do the hard ones. And if it’s still all Greek to you, don’t worry! Keep practicing and you’ll get it, I promise!! Don’t forget to count electrons and don’t forget CONS!

Hon Chemistry 2-17-17 Resonance & Polyatomic Ions & Molecular Geometry from Tammy Skinner on Vimeo.

flickr photo by Ron Layters