Turn in Molecular geometry packet
Checked in homework from last week: What is a Bond? How and Why Does it Form? worksheets and notes on the two videos Bonding Models and Lewis Structure and Covalent Bonding Video
Picked up two worksheets titled Molecular Shapes from Lewis Structure
Molecular Geometry:
VSEPR- "valence shell electron pair repulsion"
-"clouds" of electrons repel each other and position themselves as far apart as possible around a central atom
- there are two times of electron "clouds" :
a pair of electrons in a bond
a pair of unbonded electrons, aka, a lone pair
2 Questions:
1. How many clouds are around the central atom? (How are they arranged?)
2. How many clouds are bonding and how many are lone pairs?
Geometries:
A - central atom
X - terminal atoms
E - lone pair on central atom
VSEPR code # of Clouds Geometry
AX_2 2 Clouds linear (180deg)
AX_3 3 Clouds trigonalplanar (120deg)
AX_2E bent (~120deg)
AX_4 tetrahedral (109.5deg)
AX_3E 4 Clouds trigonalpyramid (~109.5deg)
AX_2E_2 bent (~105deg)
There are more but this is as far as we got in class today.
If the homework includes Lewis Structures with more than 4 clouds, I'm sure you can Google and VSEPR Chart and use that!
Ms. Friedmann showed us a molecule simulation in class. She posted that under Unit 7 on Moodle so feel free to play around with it!
Homework:
The two worksheets we picked up in the beginning of class
Two Webassigns due tomorrow night at 11:59
NEXT BLOGGER: Gemini Plamoottil
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