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IMF basics

100

What is the strongest IMF?

H-bonding

200

What is the weakest IMF? (all molecules have)

London Dispersion Forces

300

What IMF(s) do polar molecules have?

Dipole-dipole & London Dispersion

400

What does IMF stand for (write out the word)

Intermolecular forces

500

How do IMFs connect with the observable world? What do they explain?

They determine the physical properties we see in substances/materials

Lewis Structures

100

What type of molecules or compounds do we draw Lewis Structures for?

Covalent (share electrons) molecules

200

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.

300

What is the first step for drawing a molecule's Lewis structure?

Count your total amount of valence electrons

400

What is the Lewis Structure of SiCl₄?

See whiteboard (Miss Judy)

500

What is the Lewis Structure of SO₃^2- (sulfite)

See whiteboard (Miss Judy)

Molecular Geometry

100

How does molecular geometry differ from Lewis Structures?

Molecular Geometry shows the 3D position of atom arrangement

200

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.

300

What is the molecular geometry of SiCl₄?

Tetrahedral

400

What is the molecular geometry of SO₃^2-?

trigonal planar

500

What category of molecular geometry is required for having a polar molecule?

asymmetrical (lone pairs on central)

Molecular Polarity

100

What does it mean for a molecule to be non polar?

Equal sharing of electrons, no partial charge

200

Is the following bond polar or non polar?

C-F (C= 2.5 ; F = 4)

Polar (individual bond)

300

What type of molecule has dipole-dipole IMFs?

polar molecule

400

What type of a molecule will engage in Hydrogen bonding?

polar molecule with H-O or H-N or H-F

500

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

Bonus

100

What should you do when you don't understand a problem?

Ask questions!

200

Who should you email if you don't understand a concept?

Miss Judy

300

Who wants to help you learn chemistry?

Miss Judy

400

How can you schedule a time to go over questions?

email miss Judy or talk in person

500

What are the names of both the TAs?

Alina and Violet