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Students explore how critical discoveries shaped and modified modern atomic theory. They investigate how the first atomic theory was constructed, create their own atomic models of various elements, learning how to "build a nucleus" and fill electron orbitals, and perform a series of line spectral analyses, using flame tests and spectroscopes to observe several metallic salt compounds. Kit includes enough materials for at least 30 students working in groups.

• Re-create the discoveries that led to modern atomic theory
• Model atoms based on information from the periodic table
• Perform spectral analysis

By "time-traveling" through history, students explore how critical discoveries shaped and modified modern atomic theory. In the first activity, students investigate how the first atomic theory was constructed and how subsequent discoveries of subatomic particles and their properties evolved into present theory. Then they create their own atomic models of various elements, learning how to "build a nucleus" and fill electron orbitals based on information from the periodic table. Finally, students perform a series of line spectral analyses, using flame tests and spectroscopes to observe several metallic salt compounds, and examine the utility of this application in identifying unknown substances. Kit includes enough materials for at least 30 students working in groups. Receive a FREE digital Teacher's Manual and Student Guide with kit purchase.