Journal Entry:

What properties did you discover are most effective at distinguishing between bond types? How would you test for those properties?

Learning Intentions

• You will learn what properties various bond types have.

• You will learn how to design experiments to test various bond types of unlabeled substances.

• You will learn how to use data from experiments to determine types of bond in unlabeled substances.

Closing Task:

You can perform experiments and analyze results to determine what types of bonds are found in 4 unknown substances.

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)

Metallic solids are good conductors of heat and electricity, have a wide range of melting points, and are shiny, malleable ductile and readily alloyed. (EK 2.D.2)

Ionic Solids have high melting points, are brittle, and conduct electricity only when molten or in solution. (EK 2.D.1)

Molecular solids with low molecular weight usually have low melting points and are not expected to conduct electricity as solids, in solution or when molten.  (EK 2.4.4)

Students are able to design or evaluate a plan to collect and/or interpret data needed to deduce the type of bonding in a sample of a solid. (LO 2.22)