IMF basics
What is the strongest IMF?
H-bonding
What type of molecules or compounds do we draw Lewis Structures for?
Covalent (share electrons) molecules
How does molecular geometry differ from Lewis Structures?
Molecular Geometry shows the 3D position of atom arrangement
What does it mean for a molecule to be non polar?
Equal sharing of electrons, no partial charge
What should you do when you don't understand a problem?
Ask questions!
What is the weakest IMF? (all molecules have)
London Dispersion Forces
What do Lewis Structures tell us or show?
They show how atoms are arranged around a central atom in a molecule. And they show electron distribution.
What does Valence Shell Electron Pair Repulsion (VSEPR) theory tell us?
Electron domains (single bond, double/triple bond, and lone pairs) around the central atom will repel each other giving specific bond angles with the shapes.
Is the following bond polar or non polar?
C-F (C= 2.5 ; F = 4)
Polar (individual bond)
Who should you email if you don't understand a concept?
Miss Judy
What IMF(s) do polar molecules have?
Dipole-dipole & London Dispersion
What is the first step for drawing a molecule's Lewis structure?
Count your total amount of valence electrons
What is the molecular geometry of SiCl4?
Tetrahedral
What type of molecule has dipole-dipole IMFs?
polar molecule
Who wants to help you learn chemistry?
Miss Judy
What does IMF stand for (write out the word)
Intermolecular forces
What is the Lewis Structure of SiCl4?
See whiteboard (Miss Judy)
What is the molecular geometry of SO32-?
trigonal planar
What type of a molecule will engage in Hydrogen bonding?
polar molecule with H-O or H-N or H-F
How can you schedule a time to go over questions?
email miss Judy or talk in person
How do IMFs connect with the observable world? What do they explain?
They determine the physical properties we see in substances/materials
What is the Lewis Structure of SO32- (sulfite)
See whiteboard (Miss Judy)
What category of molecular geometry is required for having a polar molecule?
asymmetrical (lone pairs on central)
Decide whether the following combinations result in polar or nonpolar molecule:
1) polar individual bonds; symmetrical shape
2) polar individual bonds; asymmetrical shape
3) nonpolar individual bonds; asymmetrical shape
1) non polar molecule
2) polar molecule
3) non polar molecule
What are the names of both the TAs?
Alina and Violet