Molecular Geometry Flashcards
Are molecules 3D or 2D?
3D
What does VSEPR stand for?
Valence Shell Electron Pair Repulsion
What does the VSEPR theory state?
Repulsions between valence shell electron pairs cause the molecule’s shape to adjust so the valence electrons are as far as possible.
What is a lone pair?
An electron pair, also known as a nonbonding pair, is a pair of electrons that don’t get shared/exchanged in a bond.
What is a bonding pair?
A pair of electrons that are shared/exchanged, forming a line between two elements.
What is repulsion?
A force that pushes something apart.
Do unshared pairs repel each other slightly more or less than shared pairs?
Unshared pairs repel each other slights more because negatives repel each other.
What does more repulsion result in?
Bond angle decrease.
How do you determine molecular shape?
Draw Lewis dot structure (bonds = lines, lone pairs = dots)
Which atom is typically written first?
Central atom. (hydrogen never center)
What does molecular shape determine?
Behavior
Where is a dotted angle?
Behind plane
Where is a solid angle?
In front of plane
Where is a solid angle?
In front of the plane
Whats an example of a Linear?
CO2
