Element: Fcts - Cals - Expts & Apps.

CHEM101 General Chemistry I

Task

Know Your Element (Facts)

1) Report the name and formula of a compound or polyatomic ion that contains your element. The compound must contain at least one (1) other element and at least three (3) atoms.

2) Describe the types of bonding present in the compound/ion from 1.

3) Denote the electronic structure for each of the common ions of your element. Briefly explain why each of them is common.

Put Some Numbers To It (Calculations)

1) Calculate approximate bond lengths & bond angles in compound #4 using ionic/covalent/atomic radii, VESPR, and unit cell geometry as appropriate.

2) Determine approximate bond lengths & bond angles using Avogadro for covalent compounds or unit cell dimensions and trigonometry for ionic compounds.

3) Compare and contrast the results from #1 and #2. Explain the source of any differences you find.

In The Lab (Experiment)

1. Consider the following hypothesis: "Your element is capable of hypervalency (exceeding an octet)". Design an experiment to test this hypothesis for your element.

2. Describe possible outcomes of your experiment in #1. What could you conclude from each of those outcomes?

Tell Me More (Narrative)

1. Describe any cases where your element exceeds an octet or is octet deficient. What is it about the bonding in those cases that allows or prefers those exceptions?

2. How is your element important to the medical field — device, process, or impact? Describe in detail how your element is involved and the chemistry that occurs.

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