Journal Entry:

What is the difference between intermolecular and intramolecular forces? Give an example of each changing.   

Learning Intentions

• We will learn what bond order is, how it relates to sigma and pi bonds as well as bond length and energy.

• We will learn limitations to Lewis structures and VSEPR theory and be introduced to Molecular Orbital theory

• We will learn the difference between intermolecular and intramolecular forces.

• We will learn how to predict strength of intermolecular forces based on evaporation rates and be able to relate to the structure of the molecules in the substance.

Closing Task:

You can draw pictures to represent both intramolecular and intermolecular forces.

Content Standards being covered:

Students can predict the type of bonding present between two atoms in a binary compound based on position in the periodic table and the electronegativity of the elements. (LO 2.17)

Ionic bonding results from the net attraction between oppositely charged ions, closely packed together in a crystal lattice. (EK 2.C.2)

Students are able to use Lewis diagrams and VSEPR to predict the geometry of molecules, identify hybridization and make predictions about polarity. (LO 2.21)

Students are able to use aspects of particulate models (i.e. particle spacing, motion, and forces of attraction) to reason about observed differences between solid and liquid phases and among solid and liquid materials.